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index 02164e05401d92140618f5cbe2dc0ec5d91bf932..e38eeec025240806ca7af9e8e723459823288685 100644
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+       style="color:#000000;display:inline;overflow:visible;visibility:visible;fill:#ffdd55;fill-opacity:1;fill-rule:evenodd;stroke:none;stroke-width:2.81735682;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker:none;enable-background:accumulate"
        id="rect4289"
        width="226.77165"
-       height="226.77165"
+       height="199.99998"
        x="-2.4930778e-06"
-       y="668.97638"
-       ry="21.259838" />
+       y="662.51971"
+       ry="9.9999924" />
     <text
        xml:space="preserve"
        style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:29.33333397px;line-height:125%;font-family:Arial;-inkscape-font-specification:Arial;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:0px;word-spacing:0px;text-transform:none;writing-mode:lr-tb;direction:ltr;baseline-shift:baseline;text-anchor:start;white-space:normal;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:0.99999994px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate"
diff --git a/Doc/Sd1/languageFundamentals.xml b/Doc/Sd1/languageFundamentals.xml
index 03cc78bc37a055900a05164b8a2dcf0df655817b..2d6a311db58ea83e059eeb1a57db155c58ffefcd 100644
--- a/Doc/Sd1/languageFundamentals.xml
+++ b/Doc/Sd1/languageFundamentals.xml
@@ -1,25 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<chapter annotations="slide" version="5.1" xml:id="sw1LanguageFundamental"
-         xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xila="http://www.w3.org/2001/XInclude/local-attributes"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         xmlns:trans="http://docbook.org/ns/transclusion"
-         xmlns:svg="http://www.w3.org/2000/svg"
-         xmlns:m="http://www.w3.org/1998/Math/MathML"
-         xmlns:html="http://www.w3.org/1999/xhtml"
-         xmlns:db="http://docbook.org/ns/docbook">
+<chapter annotations="slide" version="5.1" xml:id="sw1LanguageFundamental" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xila="http://www.w3.org/2001/XInclude/local-attributes" xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:trans="http://docbook.org/ns/transclusion" xmlns:svg="http://www.w3.org/2000/svg" xmlns:m="http://www.w3.org/1998/Math/MathML" xmlns:html="http://www.w3.org/1999/xhtml" xmlns:db="http://docbook.org/ns/docbook">
   <title>Language Fundamentals</title>
 
   <section xml:id="sd1_sect_langFundamental_intro">
     <title>Introduction</title>
 
     <section xml:id="sd1_fig_asciiAndUnicode">
-      <title>Integer, <xref linkend="glo_ASCII"/> and <xref
-      linkend="glo_unicode"/></title>
+      <title>Integer, <xref linkend="glo_ASCII"/> and <xref linkend="glo_unicode"/></title>
 
-      <para>We will deal with computation machines. Having just mechanical
-      devices at hand this still works:</para>
+      <para>We will deal with computation machines. Having just mechanical devices at hand this still works:</para>
 
       <figure xml:id="sd1_fig_cashier">
         <title>Cash register</title>
@@ -51,9 +40,7 @@
         </mediaobject>
       </figure>
 
-      <para>So far all machines being described are based on non-semiconductor
-      technologies. Inventing the transistor in the fifties gave rise to a
-      rapid development of microprocessor chips:</para>
+      <para>So far all machines being described are based on non-semiconductor technologies. Inventing the transistor in the fifties gave rise to a rapid development of microprocessor chips:</para>
 
       <figure xml:id="sd1_fig_microprocessors">
         <title>Microprocessor ICs</title>
@@ -65,9 +52,7 @@
         </mediaobject>
       </figure>
 
-      <para>These sample devices differ heavily with respect to addressable
-      memory, data size, supported arithmetic operations / speed and other
-      features. We take a closer look to Zilog's Z80 processor:</para>
+      <para>These sample devices differ heavily with respect to addressable memory, data size, supported arithmetic operations / speed and other features. We take a closer look to Zilog's Z80 processor:</para>
 
       <figure xml:id="sd1_fig_z80">
         <title>Zilog Z80 CPU</title>
@@ -79,8 +64,7 @@
         </mediaobject>
       </figure>
 
-      <para>Following technological advances processors have been categorized
-      by the length the so called address- and data-bus:</para>
+      <para>Following technological advances processors have been categorized by the length the so called address- and data-bus:</para>
 
       <figure xml:id="sd1_fig_adressDataBus">
         <title>Address and data bus sizes</title>
@@ -148,9 +132,7 @@
         </informaltable>
       </figure>
 
-      <para>We remind the reader to the binary representation of signed
-      integer values. Details will be discussed in your math lectures. Our
-      first example features three bit 2-complement:</para>
+      <para>We remind the reader to the binary representation of signed integer values. Details will be discussed in your math lectures. Our first example features three bit 2-complement:</para>
 
       <figure xml:id="sd1_fig_signed3bitIntDual">
         <title>Signed 3 bit integer representation</title>
@@ -162,8 +144,7 @@
         </mediaobject>
       </figure>
 
-      <para>Signed <code>byte</code> values are being represented
-      accordingly:</para>
+      <para>Signed <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-A">byte</code> values are being represented accordingly:</para>
 
       <figure xml:id="sd1_fig_signedIntRepresentBinary">
         <title>Signed 8 bit integer binary representation</title>
@@ -181,28 +162,21 @@
         <qandadiv>
           <qandaentry>
             <question>
-              <para>A hotel supplies the following type of cards for opening
-              room doors:</para>
+              <para>A hotel supplies the following type of cards for opening room doors:</para>
 
               <mediaobject>
                 <imageobject>
-                  <imagedata fileref="Ref/LangFundament/keycard.jpg"
-                             scale="25"/>
+                  <imagedata fileref="Ref/LangFundament/keycard.jpg" scale="25"/>
                 </imageobject>
               </mediaobject>
 
-              <para>A customer is worried concerning the impact of loosing his
-              card. For security reasons the corresponding pattern can never
-              be issued again. Thus the hotel may eventually run out of
-              combinations.</para>
+              <para>A customer is worried concerning the impact of loosing his card. For security reasons the corresponding pattern can never be issued again. Thus the hotel may eventually run <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> on available combinations.</para>
 
-              <para>Discuss this argument by estimating the number of distinct
-              patterns.</para>
+              <para>Discuss this argument by estimating the number of distinct patterns.</para>
             </question>
 
             <answer>
-              <para>The customer should not be too worried: Judging the image
-              a card probably offers 39 grid positions:</para>
+              <para>No need to be worried: Judging the image a card probably offers 39 grid positions:</para>
 
               <programlisting language="none">X X X X X X  
  X X X X X 
@@ -212,8 +186,7 @@ X X X X X X
  X X X X X 
 X X X X X X</programlisting>
 
-              <para>Since each position may either contain a hole or be solid
-              we have <inlineequation>
+              <para>Since each position may either contain a hole or be solid we have <inlineequation>
                   <m:math display="inline">
                     <m:mrow>
                       <m:msup>
@@ -233,8 +206,7 @@ X X X X X X</programlisting>
         </qandadiv>
       </qandaset>
 
-      <para>Regarding language characters we start with one of the oldest and
-      widespread character encoding schemes:</para>
+      <para>Regarding language characters we start with one of the oldest and widespread character encoding schemes:</para>
 
       <figure xml:id="sd1_fig_7bitASCII">
         <title>7-bit <xref linkend="glo_ASCII"/></title>
@@ -246,10 +218,7 @@ X X X X X X</programlisting>
         </mediaobject>
       </figure>
 
-      <para><xref linkend="glo_ASCII"/> by design is limited to US characters
-      and does not include characters from non-English languages. Since <xref
-      linkend="glo_ASCII"/> only uses seven bits we may a parity bit to form
-      one byte per character:</para>
+      <para><xref linkend="glo_ASCII"/> by design is limited to US characters and does not include characters from non-English languages. Since <xref linkend="glo_ASCII"/> only uses seven bits we may a parity bit to form one byte per character:</para>
 
       <figure xml:id="sd1_fig_7bitASCII_andParity">
         <title>7-bit <xref linkend="glo_ASCII"/> with even parity bit</title>
@@ -261,16 +230,10 @@ X X X X X X</programlisting>
         </mediaobject>
       </figure>
 
-      <para>A byte's parity bit may instead be used for encoding non- <xref
-      linkend="glo_ASCII"/> supplementary characters. One such example is the
-      <link xlink:href="https://en.wikipedia.org/wiki/ISO/IEC_8859-1">ISO
-      8859-1 (ISO Latin 1)</link> standard representing western European
-      character sets:</para>
+      <para>A byte's parity bit may instead be used for encoding non- <xref linkend="glo_ASCII"/> supplementary characters. One such example is the <link xlink:href="https://en.wikipedia.org/wiki/ISO/IEC_8859-1">ISO 8859-1 (ISO Latin 1)</link> standard representing western European character sets:</para>
 
       <figure xml:id="sd1_fig_iso8859_1">
-        <title><link
-        xlink:href="https://en.wikipedia.org/wiki/ISO/IEC_8859-1">ISO Latin
-        1</link> encoding</title>
+        <title><link xlink:href="https://en.wikipedia.org/wiki/ISO/IEC_8859-1">ISO Latin 1</link> encoding</title>
 
         <mediaobject>
           <imageobject>
@@ -279,13 +242,10 @@ X X X X X X</programlisting>
         </mediaobject>
       </figure>
 
-      <para>Supporting additional languages comes at a price: We have to
-      increase the number of bytes representing a single character:</para>
+      <para>Supporting additional languages comes at a price: We have to increase the number of bytes representing a single character:</para>
 
       <figure xml:id="sd1_fig_unicodeSample">
-        <title>Some <xref linkend="glo_unicode"/> <link
-        xlink:href="https://en.wikipedia.org/wiki/UTF-8">UTF-8</link>
-        samples</title>
+        <title>Some <xref linkend="glo_unicode"/> <link xlink:href="https://en.wikipedia.org/wiki/UTF-8">UTF-8</link> samples</title>
 
         <mediaobject>
           <imageobject>
@@ -294,19 +254,13 @@ X X X X X X</programlisting>
         </mediaobject>
       </figure>
 
-      <para>Notice the representation's differing byte count: <link
-      xlink:href="https://en.wikipedia.org/wiki/UTF-8">UTF-8</link> <xref
-      linkend="glo_unicode"/> encoding allows for one-, two-, three- and four-
-      byte encodings. See <quote
-      xlink:href="https://betterexplained.com/articles/unicode">Unicode and
-      You</quote> for further details.</para>
+      <para>Notice the representation's differing byte count: <link xlink:href="https://en.wikipedia.org/wiki/UTF-8">UTF-8</link> <xref linkend="glo_unicode"/> encoding allows for one-, two-, three- and four- byte encodings. See <quote xlink:href="https://betterexplained.com/articles/unicode">Unicode and You</quote> for further details.</para>
     </section>
 
     <section xml:id="sd1_sect_variables">
       <title>Variables</title>
 
-      <para>Variables are convenient handles for accessing memory. We don't
-      need to mess with memory addresses:</para>
+      <para>Variables are convenient handles for accessing memory. We don't need to mess with memory addresses:</para>
 
       <figure xml:id="sd1_fig_varMemoryHandle">
         <title>Handle to memory</title>
@@ -318,8 +272,7 @@ X X X X X X</programlisting>
         </mediaobject>
       </figure>
 
-      <para>Declaring a variable requires a type name like <code>double</code>
-      and an identifier:</para>
+      <para>Declaring a variable requires a type name like <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">double</code> and an identifier:</para>
 
       <figure xml:id="sd1_fig_varDeclare">
         <title>Variable declaration</title>
@@ -327,8 +280,7 @@ X X X X X X</programlisting>
         <programlisting language="java">double pi;</programlisting>
       </figure>
 
-      <para>We may assign values to variables or build expressions like
-      <code>pi * 2.0 * 2.0</code> :</para>
+      <para>We may assign values to variables or build expressions like <code>pi * 2.0 * 2.0</code> :</para>
 
       <figure xml:id="sd1_fig_varDeclareAndUse">
         <title>Declare and use</title>
@@ -396,13 +348,11 @@ int c;</programlisting>
 
         <itemizedlist>
           <listitem>
-            <para>Start with a small letter like <code>africa</code> rather
-            than <code>Africa</code>.</para>
+            <para>Start with a small letter like <code>africa</code> rather than <code>Africa</code>.</para>
           </listitem>
 
           <listitem>
-            <para>Use <quote>camel case</quote> e.g.
-            <code>myFirstCode</code>.</para>
+            <para>Use <quote>camel case</quote> e.g. <code>myFirstCode</code>.</para>
 
             <mediaobject>
               <imageobject>
@@ -521,11 +471,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
         <qandadiv>
           <qandaentry>
             <question>
-              <para>Which of the following names are legal variable names?
-              Complete the following table and explain your decision with
-              respect to the <quote
-              xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc4_html_3">variables</quote>
-              section.</para>
+              <para>Which of the following names are legal variable names? Complete the following table and explain your decision with respect to the <quote xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc4_html_3">variables</quote> section.</para>
 
               <informaltable border="1">
                 <colgroup width="19%"/>
@@ -648,24 +594,20 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
               </informaltable>
 
               <tip>
-                <para>You may want to prepare a simple <xref
-                linkend="glo_Java"/> program testing the above names.</para>
+                <para>You may want to prepare a simple <xref linkend="glo_Java"/> program testing the above names.</para>
               </tip>
             </question>
 
             <answer>
-              <para>We may write a small <xref linkend="glo_Java"/>
-              program:</para>
+              <para>Consider:</para>
 
               <programlisting language="java">public static void main(String[] args) {
    int 42isThesolution = 6; // <emphasis role="bold">Syntax error on token "42", delete this token</emphasis>
 }</programlisting>
 
-              <para>Unfortunately the error explanation is not too helpful
-              with respect to <xref linkend="glo_Java"/> beginners. It does
-              not immediately point towards an illegal identifier problem. One
-              indication of a sound compiler is its ability to provide
-              meaningful, self explanatory error messages.</para>
+              <para>Unfortunately this message does not explain the underlying cause: It does not hint towards an illegal identifier name.</para>
+
+              <para>One indication of a sound compiler implementation is its ability to provide meaningful, self explanatory error messages.</para>
 
               <informaltable border="1">
                 <colgroup width="19%"/>
@@ -711,8 +653,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
 
                   <td>no</td>
 
-                  <td>Operators like <quote>-</quote> or <quote>+</quote> must
-                  not appear in variable names.</td>
+                  <td>Operators like <quote>-</quote> or <quote>+</quote> must not appear in variable names.</td>
                 </tr>
 
                 <tr>
@@ -720,8 +661,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
 
                   <td>yes</td>
 
-                  <td>Best practices: Discouraged variable name, non-constant
-                  variables should start with lowercase letters.</td>
+                  <td>Best practices: Discouraged variable name, non-constant variables should start with lowercase letters.</td>
                 </tr>
 
                 <tr>
@@ -737,9 +677,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
 
                   <td>yes</td>
 
-                  <td><code>println</code> is a method of
-                  <code>System.out.println(...)</code> but is no <xref
-                  linkend="glo_Java"/> keyword.</td>
+                  <td><code>println</code> is a method of <code>System.out.println(...)</code> but is no <xref linkend="glo_Java"/> keyword.</td>
                 </tr>
 
                 <tr>
@@ -747,8 +685,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
 
                   <td>yes</td>
 
-                  <td>Best practices: Discouraged variable name, non-constant
-                  variables should start with lowercase letters.</td>
+                  <td>Best practices: Discouraged variable name, non-constant variables should start with lowercase letters.</td>
                 </tr>
 
                 <tr>
@@ -756,9 +693,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
 
                   <td>yes</td>
 
-                  <td>Best practices: Legal but discouraged variable name:
-                  Non-constant variables should start with lowercase
-                  letters.</td>
+                  <td>Best practices: Legal but discouraged variable name: Non-constant variables should start with lowercase letters.</td>
                 </tr>
 
                 <tr>
@@ -766,8 +701,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
 
                   <td>no</td>
 
-                  <td>String delimiters must not be part of an
-                  identifier.</td>
+                  <td>String delimiters must not be part of an identifier.</td>
                 </tr>
 
                 <tr>
@@ -783,8 +717,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
 
                   <td>yes</td>
 
-                  <td>Perfectly legal Greek <orgname>Unicode</orgname>
-                  characters.</td>
+                  <td>Perfectly legal Greek <orgname>Unicode</orgname> characters.</td>
                 </tr>
 
                 <tr>
@@ -792,8 +725,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
 
                   <td>yes</td>
 
-                  <td>Best practices: Using the <quote>$</quote> sign should
-                  be reserved for system code.</td>
+                  <td>Best practices: Using the <quote>$</quote> sign should be reserved for system code.</td>
                 </tr>
               </informaltable>
             </answer>
@@ -837,8 +769,56 @@ i = b;     // Error: int and boolean are incompatible types
 i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
       </figure>
 
-      <para><xref linkend="glo_Java"/> provides meta information on
-      types:</para>
+      <qandaset defaultlabel="qanda" xml:id="sd1_qanda_typeAssignCompat">
+        <title>Assignment and type safety</title>
+
+        <qandadiv>
+          <qandaentry>
+            <question>
+              <para>We consider:</para>
+
+              <programlisting language="java">int i = -21;
+double d = i;</programlisting>
+
+              <para>This snippet shows perfectly correct <xref linkend="glo_Java"/> code. However <xref linkend="sd1_fig_typeSafety"/> suggests we should not be allowed to assign an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> to a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">double</code> value due to type safety.</para>
+
+              <para>Even worse: Swapping types yields a compile time error:</para>
+
+              <programlisting language="java">double d = 2.4;
+int i = d; // Error: Incompatible types</programlisting>
+
+              <para>Why is this? Make an educated guess.</para>
+            </question>
+
+            <answer>
+              <para>The first snippet compiles by using the widening conversion: When assigning <code>d = i</code> the <xref linkend="glo_Java"/> compiler implicitly converts the <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> into a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">double</code> value.</para>
+
+              <para>Turning a double into an int is more cumbersome: The expression <code>i = 3.5</code> could be evaluated by agreeing on a specific rounding prescription. But what about i = 3457357385783573478955345.45? A <xref linkend="glo_Java"/> <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code>'s maximum value is <inlineequation>
+                  <m:math display="inline">
+                    <m:mrow>
+                      <m:msup>
+                        <m:mi>2</m:mi>
+
+                        <m:mi>31</m:mi>
+                      </m:msup>
+
+                      <m:mo>-</m:mo>
+
+                      <m:mi>1</m:mi>
+                    </m:mrow>
+                  </m:math>
+                </inlineequation>exceeding the former <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">double</code> value.</para>
+
+              <para>Conclusion: <xref linkend="glo_Java"/> disallows double to int assignments unless using a so called cast (explicit type conversion):</para>
+
+              <programlisting language="java">double d = 2.4;
+int i = (int) d; // Explicit cast double to int</programlisting>
+            </answer>
+          </qandaentry>
+        </qandadiv>
+      </qandaset>
+
+      <para><xref linkend="glo_Java"/> provides meta information on types:</para>
 
       <figure xml:id="sd1_fig_intTypeMaxMin">
         <title>Maximum and minimum values</title>
@@ -857,11 +837,9 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
           <tr>
             <td>byte</td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Byte.html#BYTES">1</link></td>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Byte.html#BYTES">1</link></td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Byte.MIN_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Byte.MIN_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:mo>-</m:mo>
@@ -875,8 +853,7 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
                 </m:math>
               </inlineequation></link></td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Byte.MAX_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Byte.MAX_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:msup>
@@ -896,13 +873,11 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
           <tr>
             <td>char</td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Byte.html#BYTES">2</link></td>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Byte.html#BYTES">2</link></td>
 
             <td>0</td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Character.MAX_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Character.MAX_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:msup>
@@ -922,11 +897,9 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
           <tr>
             <td>short</td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Short.BYTES">2</link></td>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Short.BYTES">2</link></td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Short.MIN_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Short.MIN_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:mo>-</m:mo>
@@ -940,8 +913,7 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
                 </m:math>
               </inlineequation></link></td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Short.MAX_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Short.MAX_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:msup>
@@ -961,11 +933,9 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
           <tr>
             <td>int</td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.BYTES">4</link></td>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.BYTES">4</link></td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MIN_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MIN_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:mo>-</m:mo>
@@ -979,8 +949,7 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
                 </m:math>
               </inlineequation></link></td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MAX_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MAX_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:msup>
@@ -1000,11 +969,9 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
           <tr>
             <td>long</td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.BYTES">8</link></td>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.BYTES">8</link></td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MIN_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MIN_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:mo>-</m:mo>
@@ -1018,8 +985,7 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
                 </m:math>
               </inlineequation></link></td>
 
-            <td><link
-            xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MAX_VALUE"><inlineequation>
+            <td><link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MAX_VALUE"><inlineequation>
                 <m:math display="inline">
                   <m:mrow>
                     <m:msup>
@@ -1038,102 +1004,15 @@ i = "Hello"; // Even worse: Assigning a String to an int</programlisting>
         </informaltable>
       </figure>
 
-      <figure xml:id="sd1_fig_variableCategories">
-        <title>Two categories of variables</title>
-
-        <glosslist>
-          <glossentry>
-            <glossterm>Primitive type</glossterm>
-
-            <glossdef>
-              <programlisting language="java">int a = -15;</programlisting>
-
-              <para>Possible types: All eight primitive <xref
-              linkend="glo_Java"/> types.</para>
-            </glossdef>
-          </glossentry>
-
-          <glossentry>
-            <glossterm>Reference type</glossterm>
-
-            <glossdef>
-              <programlisting language="java">GpsPosition start = new GpsPosition(48.7758, 9.1829);</programlisting>
-
-              <para>Possible types: Arbitrary built in or user defined
-              classes.</para>
-            </glossdef>
-          </glossentry>
-        </glosslist>
-      </figure>
-
-      <figure xml:id="sd1_fig_refTypeVariants">
-        <title>Reference type variants</title>
-
-        <programlisting language="java">GpsPosition start = new GpsPosition(48.7758, 9.1829);
-String name = "Simon";
-LocalDate birtday = LocalDate.of(1990, Month.JULY, 5);</programlisting>
-      </figure>
-    </section>
-
-    <section xml:id="sd1_sect_literals">
-      <title>Literals</title>
-
-      <figure xml:id="sd1_fig_literal2memory">
-        <title><code>float</code> and <code>double</code></title>
-
-        <mediaobject>
-          <imageobject>
-            <imagedata fileref="Ref/LangFundament/literalToMemory.svg"/>
-          </imageobject>
-        </mediaobject>
-      </figure>
-
-      <figure xml:id="sd1_fig_equivalentIntRepresentations">
-        <title>Four ways representing 35</title>
-
-        <informaltable border="1">
-          <tr>
-            <th>Code</th>
-
-            <th>Result</th>
-          </tr>
-
-          <tr>
-            <td><programlisting language="java">System.out.println("Decimal "+ <emphasis
-                  role="bold">35</emphasis>); 
-System.out.println("Binary " + <emphasis role="bold">0b10_0011</emphasis>);
-System.out.println("Hex "    + <emphasis role="bold">0x23</emphasis>);   
-System.out.println("Octal "  + <emphasis role="bold">043</emphasis>);   </programlisting></td>
-
-            <td><screen>Decimal 35
-Binary  35
-Hex 35
-Octal 35</screen></td>
-          </tr>
-        </informaltable>
-      </figure>
-
-      <figure xml:id="sd1_fig_intLiteralLimitExcess">
-        <title>Know your limits!</title>
-
-        <programlisting language="java">System.out.println(10000000000<emphasis
-            role="bold">L</emphasis>);  // o.K.
-System.out.println(10000000000 );  // Compile time error: Integer number too large</programlisting>
-      </figure>
-
       <qandaset defaultlabel="qanda" xml:id="sw1QandaMaxMinInt">
-        <title>An <code>int</code>'s minimum and maximum value</title>
+        <title>An <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code>'s minimum and maximum value</title>
 
         <qandadiv>
           <qandaentry>
             <question>
-              <para>In this exercise we look at an <code>int</code>'s the
-              largest and smallest possible value.</para>
+              <para>In this exercise we look at an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code>'s the largest and smallest possible value.</para>
 
-              <para>A <xref linkend="glo_Java"/> <code
-              xlink:href="https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html">int</code>
-              is internally being represented by 4 <link
-              linkend="glo_byte">bytes</link>. <inlineequation>
+              <para>A <xref linkend="glo_Java"/> <code xlink:href="https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html">int</code> is internally being represented by 4 <link linkend="glo_byte">bytes</link>. <inlineequation>
                   <m:math display="inline">
                     <m:msub>
                       <m:mi>00000000000000000000000000000101</m:mi>
@@ -1141,19 +1020,12 @@ System.out.println(10000000000 );  // Compile time error: Integer number too lar
                       <m:mi>2</m:mi>
                     </m:msub>
                   </m:math>
-                </inlineequation> for example represents the decimal value
-              5.</para>
+                </inlineequation> for example represents the decimal value 5.</para>
 
-              <para>In order to represent negative values as well <xref
-              linkend="glo_Java"/> uses <link
-              xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's
-              complement</link> representation. We provide some values:</para>
+              <para>In order to represent negative values as well <xref linkend="glo_Java"/> uses <link xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's complement</link> representation. We provide some values:</para>
 
               <table border="1" xml:id="sw1Table4ByteIntegerRepresentation">
-                <caption>4 Byte <link
-                xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's
-                complement</link> representation of <code>int</code>
-                values.</caption>
+                <caption>4 Byte <link xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's complement</link> representation of <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> values.</caption>
 
                 <tr>
                   <th>Two complement representation</th>
@@ -1224,15 +1096,7 @@ System.out.println(10000000000 );  // Compile time error: Integer number too lar
                 </tr>
               </table>
 
-              <para>Use <link
-              xlink:href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-3.10.1"><code>int</code>
-              literals</link> in <link
-              xlink:href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-BinaryNumeral">binary
-              representation</link> like e.g. <code>0B1100</code> in section
-              <quote
-              xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc6_html_2">Literals</quote>
-              in order to write an <code>int</code>'s minimum and maximum
-              possible value to standard output.</para>
+              <para>Use <link xlink:href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-3.10.1"><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> literals</link> in <link xlink:href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-BinaryNumeral">binary representation</link> like e.g. <code>0B1100</code> in section <quote xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc6_html_2">Literals</quote> in order to write an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code>'s minimum and maximum possible value to standard output.</para>
 
               <programlisting language="java">   public static void main(String[] args) {
       
@@ -1245,11 +1109,7 @@ System.out.println(10000000000 );  // Compile time error: Integer number too lar
             </question>
 
             <answer>
-              <para>We insert <link
-              xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's
-              complement</link> representations of minimum and maximum int
-              values according to <xref
-              linkend="sw1Table4ByteIntegerRepresentation"/>.</para>
+              <para>We insert <link xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's complement</link> representations of minimum and maximum int values according to <xref linkend="sw1Table4ByteIntegerRepresentation"/>.</para>
 
               <programlisting language="java">public static void main(String[] args) {
       
@@ -1260,18 +1120,7 @@ System.out.println(10000000000 );  // Compile time error: Integer number too lar
       System.out.println("Maximum int value:" + maximum);
    }</programlisting>
 
-              <para>BTW: The <xref linkend="glo_JDK"/> does provide maximum
-              value, minimum value and related information for
-              <code>char</code>, <code>byte</code>, <code>short</code> and
-              <code>int</code> data types int its related <classname
-              xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Character.html">Character</classname>,
-              <classname
-              xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Byte.html">Byte</classname>,
-              <classname
-              xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Short.html">Short</classname>
-              and <classname
-              xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html">Integer</classname>
-              classes. You may want to execute:</para>
+              <para>BTW: The <xref linkend="glo_JDK"/> does provide maximum value, minimum value and related information for <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code>, <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-A">byte</code>, <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> and <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> data types int its related <classname xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Character.html">Character</classname>, <classname xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Byte.html">Byte</classname>, <classname xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Short.html">Short</classname> and <classname xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html">Integer</classname> classes. You may want to execute:</para>
 
               <programlisting language="java">    System.out.println("int minimum:" + Integer.MIN_VALUE);
     System.out.println("int minimum:" + Integer.MAX_VALUE);
@@ -1284,264 +1133,141 @@ System.out.println(10000000000 );  // Compile time error: Integer number too lar
         </qandadiv>
       </qandaset>
 
-      <qandaset defaultlabel="qanda" xml:id="sw1QandaIntLimitShort">
-        <title>Testing the limits (Difficult)</title>
+      <figure xml:id="sd1_fig_variableCategories">
+        <title>Two categories of variables</title>
 
-        <qandadiv>
-          <qandaentry>
-            <question>
-              <para>A careful programmer is worried whether a short variable
-              is <emphasis role="bold">always</emphasis> large enough to hold
-              color intensity values ranging from 0 to 255. Give an answer
-              being based on the <link
-              xlink:href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-4.html#jls-4.2.1">specification</link>
-              and not just by <acronym>try-and-error</acronym>.</para>
+        <glosslist>
+          <glossentry>
+            <glossterm>Primitive type</glossterm>
 
-              <para>The programmer tries to adopt the <link
-              linkend="sw1QandaMaxMinInt">related int example</link>
-              accordingly:</para>
+            <glossdef>
+              <programlisting language="java">int a = -15;</programlisting>
 
-              <programlisting language="java">short minumum = 0B10000000_00000000,
-      maximum = 0B01111111_11111111;
+              <para>Possible types: All eight primitive <xref linkend="glo_Java"/> types.</para>
+            </glossdef>
+          </glossentry>
 
-System.out.println("Minimum short value:" + minumum);
-System.out.println("Maximum short value:" + maximum</programlisting>
+          <glossentry>
+            <glossterm>Reference type</glossterm>
 
-              <para>Our programmer is baffled:</para>
+            <glossdef>
+              <programlisting language="java">GpsPosition start = new GpsPosition(48.7758, 9.1829);</programlisting>
 
-              <itemizedlist>
-                <listitem>
-                  <para>The first assignment <code language="java">minumum =
-                  0B10000000_00000000</code> is being flagged as a compile
-                  time error:</para>
+              <para>Possible types: Arbitrary built in or user defined classes.</para>
+            </glossdef>
+          </glossentry>
+        </glosslist>
+      </figure>
 
-                  <para><computeroutput>Type mismatch: cannot convert from int
-                  to short</computeroutput></para>
-                </listitem>
+      <figure xml:id="sd1_fig_refTypeVariants">
+        <title>Reference type variants</title>
 
-                <listitem>
-                  <para>On contrary the second assignment <code
-                  language="java">maximum = 0B01111111_11111111</code> gets
-                  smoothly accepted.</para>
-                </listitem>
-              </itemizedlist>
+        <programlisting language="java">GpsPosition start = new GpsPosition(48.7758, 9.1829);
+String name = "Simon";
+LocalDate birtday = LocalDate.of(1990, Month.JULY, 5);</programlisting>
+      </figure>
+    </section>
 
-              <tip>
-                <para>Which integer literal types do exist according to the
-                <xref linkend="glo_Java"/> <link
-                xlink:href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-3.10.1">standard</link>?</para>
-              </tip>
-            </question>
+    <section xml:id="sd1_sect_literals">
+      <title>Literals</title>
 
-            <answer>
-              <para>Since variables of type <code>short</code> have a two
-              bytes representation their corresponding range is
-              <inlineequation>
-                  <m:math display="inline">
-                    <m:mrow>
-                      <m:mo>[</m:mo>
+      <figure xml:id="sd1_fig_literal2memory">
+        <title><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">float</code> and <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">double</code></title>
 
-                      <m:mrow>
-                        <m:mrow>
-                          <m:mo>-</m:mo>
+        <mediaobject>
+          <imageobject>
+            <imagedata fileref="Ref/LangFundament/literalToMemory.svg"/>
+          </imageobject>
+        </mediaobject>
+      </figure>
 
-                          <m:msup>
-                            <m:mi>2</m:mi>
+      <figure xml:id="sd1_fig_equivalentIntRepresentations">
+        <title>Four ways representing 35</title>
 
-                            <m:mi>15</m:mi>
-                          </m:msup>
-                        </m:mrow>
+        <informaltable border="1">
+          <tr>
+            <th>Code</th>
 
-                        <m:mo>,</m:mo>
+            <th>Result</th>
+          </tr>
 
-                        <m:mrow>
-                          <m:msup>
-                            <m:mi>2</m:mi>
+          <tr>
+            <td><programlisting language="java">System.out.println("Decimal "+ <emphasis role="bold">35</emphasis>); 
+System.out.println("Binary " + <emphasis role="bold">0b10_0011</emphasis>);
+System.out.println("Hex "    + <emphasis role="bold">0x23</emphasis>);   
+System.out.println("Octal "  + <emphasis role="bold">043</emphasis>);   </programlisting></td>
 
-                            <m:mi>15</m:mi>
-                          </m:msup>
+            <td><screen>Decimal 35
+Binary  35
+Hex 35
+Octal 35</screen></td>
+          </tr>
+        </informaltable>
+      </figure>
 
-                          <m:mo>-</m:mo>
+      <figure xml:id="sd1_fig_intLiteralLimitExcess">
+        <title>Know your limits!</title>
 
-                          <m:mi>1</m:mi>
-                        </m:mrow>
-                      </m:mrow>
+        <programlisting language="java">System.out.println(10000000000<emphasis role="bold">L</emphasis>);  // o.K.
+System.out.println(10000000000 );  // Compile time error: Integer number too large</programlisting>
+      </figure>
 
-                      <m:mo>]</m:mo>
-                    </m:mrow>
-                  </m:math>
-                </inlineequation>. Thus intensity values ranging from 0 to 255
-              will be easily accommodated.</para>
+      <figure xml:id="sd1_fig_javaLiterals">
+        <title><xref linkend="glo_Java"/> literals</title>
 
-              <para>The second question is more difficult to explain: The
-              <xref linkend="glo_Java"/> standard only defines
-              <code>int</code> literals. It does however not define
-              <code>short</code> (or <code>byte</code>) literals.</para>
+        <informaltable border="1">
+          <tr>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-A">byte</code>, <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code></td>
 
-              <para>Thus the 0B01111111_11111111 literal will be treated as an
-              <code>int</code> value being compatible with a
-              <code>short</code> variable and is thus assignable.</para>
+            <td>-</td>
+          </tr>
 
-              <para>On the contrary the binary value
-              <code>10000000_00000000</code> evaluates to <inlineequation>
-                  <m:math display="inline">
-                    <m:msup>
-                      <m:mn>2</m:mn>
+          <tr>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code></td>
 
-                      <m:mi>15</m:mi>
-                    </m:msup>
-                  </m:math>
-                </inlineequation> (equal to 32768) exceeding a two-byte
-              (signed) short variable's upper limit.</para>
+            <td><code>'A'</code>, <code>'\u0041'</code></td>
+          </tr>
 
-              <para>Even worse: A <code>short</code> variable containing
-              binary <code>10000000_00000000</code> due to its two byte <link
-              xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's
-              complement</link> representation has got a value <inlineequation>
-                  <m:math display="inline">
-                    <m:mrow>
-                      <m:mo>-</m:mo>
+          <tr>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code></td>
 
-                      <m:msup>
-                        <m:mn>2</m:mn>
+            <td><code>29</code>, <code>0b1_1101</code>, <code>0x1D</code>, <code>035</code>, <code>-29</code>,</td>
+          </tr>
 
-                        <m:mi>15</m:mi>
-                      </m:msup>
-                    </m:mrow>
-                  </m:math>
-                </inlineequation> (or -32768).</para>
+          <tr>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code></td>
 
-              <para>In order to avoid this error we need an explicit type
-              conversion (a so called cast):</para>
+            <td><code>35L</code>, <code>0b10_0011L</code>, <code>0x23L</code>, <code>043L</code>, <code>-35L</code>,...</td>
+          </tr>
 
-              <programlisting language="java">short minumum = (short) 0B10000000_00000000;</programlisting>
+          <tr>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">float</code></td>
 
-              <para>Since a <code>short</code> variable's range is
-              <inlineequation>
-                  <m:math display="inline">
-                    <m:mrow>
-                      <m:mo>[</m:mo>
-
-                      <m:mrow>
-                        <m:mrow>
-                          <m:mo>-</m:mo>
-
-                          <m:msup>
-                            <m:mi>2</m:mi>
-
-                            <m:mi>15</m:mi>
-                          </m:msup>
-                        </m:mrow>
-
-                        <m:mo>,</m:mo>
-
-                        <m:mrow>
-                          <m:msup>
-                            <m:mi>2</m:mi>
-
-                            <m:mi>15</m:mi>
-                          </m:msup>
-
-                          <m:mo>-</m:mo>
-
-                          <m:mi>1</m:mi>
-                        </m:mrow>
-                      </m:mrow>
-
-                      <m:mo>]</m:mo>
-                    </m:mrow>
-                  </m:math>
-                </inlineequation> we may as well use a unary minus sign
-              instead:</para>
-
-              <programlisting language="java">short minumum = -0B10000000_00000000;</programlisting>
-
-              <para>Both variants are syntactically correct and will thus
-              compile. However they are likely not being intended by our
-              programmer.</para>
-
-              <para>The error in the first place is probably assigning a value
-              of <inlineequation>
-                  <m:math display="inline">
-                    <m:mrow>
-                      <m:mo>+</m:mo>
-
-                      <m:msup>
-                        <m:mi>2</m:mi>
-
-                        <m:mi>15</m:mi>
-                      </m:msup>
-                    </m:mrow>
-                  </m:math>
-                </inlineequation> to a <code>short</code> variable at
-              all.</para>
-            </answer>
-          </qandaentry>
-        </qandadiv>
-      </qandaset>
-
-      <figure xml:id="sd1_fig_javaLiterals">
-        <title><xref linkend="glo_Java"/> literals</title>
-
-        <informaltable border="1">
-          <tr>
-            <td><code>byte</code>, <code>short</code></td>
-
-            <td>-</td>
-          </tr>
-
-          <tr>
-            <td><code>char</code></td>
-
-            <td><code>'A'</code>, <code>'\u0041'</code></td>
-          </tr>
-
-          <tr>
-            <td><code>int</code></td>
-
-            <td><code>29</code>, <code>0b1_1101</code>, <code>0x1D</code>,
-            <code>035</code>, <code>-29</code>,</td>
-          </tr>
+            <td><code>55.43F</code>, <code>1.7E-23F</code>, <code>-17.F, 100_342.334_113</code></td>
+          </tr>
 
           <tr>
-            <td><code>long</code></td>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">double</code></td>
 
-            <td><code>35L</code>, <code>0b10_0011L</code>, <code>0x23L</code>,
-            <code>043L</code>, <code>-35L</code>,...</td>
-          </tr>
-
-          <tr>
-            <td><code>float</code></td>
-
-            <td><code>55.43F</code>, <code>1.7E-23F</code>, <code>-17.F,
-            100_342.334_113</code></td>
-          </tr>
-
-          <tr>
-            <td><code>double</code></td>
-
-            <td><code>55.43</code>, <code>1.7 E -23</code>,
-            <code>-17.</code></td>
+            <td><code>55.43</code>, <code>1.7 E -23</code>, <code>-17.</code></td>
           </tr>
 
           <tr>
             <td><code>String</code></td>
 
-            <td><code>"Hello"</code>, <code>"Greek Δ"</code>, <code>"Greek
-            <link
-            xlink:href="https://www.fileformat.info/info/unicode/char/0394/index.htm">\u0394</link>"</code></td>
+            <td><code>"Hello"</code>, <code>"Greek Δ"</code>, <code>"Greek <link xlink:href="https://www.fileformat.info/info/unicode/char/0394/index.htm">\u0394</link>"</code></td>
           </tr>
 
           <tr>
-            <td><code>boolean</code></td>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.5-100">boolean</code></td>
 
-            <td><code>true</code>, <code>false</code></td>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.5-100">true</code>, <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.5-100">false</code></td>
           </tr>
 
           <tr>
             <td/>
 
-            <td><code>null</code></td>
+            <td><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.1-200">null</code></td>
           </tr>
         </informaltable>
       </figure>
@@ -1552,13 +1278,7 @@ System.out.println("Maximum short value:" + maximum</programlisting>
         <qandadiv>
           <qandaentry>
             <question>
-              <para>We want to construct a list of <link
-              xlink:href="http://www.rapidtables.com/code/text/ascii-table.htm#print">printable
-              ASCII characters</link>. Write a <xref linkend="glo_Java"/>
-              application by starting just from from character literals
-              <code>' '</code>, <code>'!'</code>, <code>'"'</code>,
-              <code>'#'</code> and so on to show their corresponding decimal
-              values. The intended output is:</para>
+              <para>We want to construct a list of <link xlink:href="http://www.rapidtables.com/code/text/ascii-table.htm#print">printable ASCII characters</link>. Write a <xref linkend="glo_Java"/> application by starting just from from character literals <code>' '</code>, <code>'!'</code>, <code>'"'</code>, <code>'#'</code> and so on to show their corresponding decimal values. The intended output is:</para>
 
               <screen> : 32
 !: 33
@@ -1568,18 +1288,15 @@ $: 36
 %: 37
 &amp;: 38</screen>
 
-              <para>Notice the empty space being represented by decimal
-              32.</para>
+              <para>Notice the empty space being represented by decimal 32.</para>
 
               <tip>
-                <para>A <code>char</code> value being represented by two bytes
-                may be easily assigned to an <code>int</code> variable.</para>
+                <para>A <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code> value being represented by two bytes may be easily assigned to an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> variable.</para>
               </tip>
             </question>
 
             <answer>
-              <para>Since <code>char</code> values may be assigned to
-              <code>int</code> variables we may code:</para>
+              <para>Since <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code> values may be assigned to <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> variables we may code:</para>
 
               <programlisting language="java">{
   char c = ' '; // space
@@ -1598,8 +1315,7 @@ $: 36
 }
 ...</programlisting>
 
-              <para>Using an explicit type conversion from char to int (a so
-              called cast) yields an identical result:</para>
+              <para>Using an explicit type conversion from char to int (a so called cast) yields an identical result:</para>
 
               <programlisting language="java">System.out.println(' ' + ": " + ((int) ' '));
 System.out.println('!' + ": " + ((int) '!'));
@@ -1620,28 +1336,11 @@ System.out.println('&amp;' + ": " + ((int) '&amp;'));
         <qandadiv>
           <qandaentry>
             <question>
-              <para>As you may know the <xref linkend="glo_RGB"/> color model
-              uses triplets of numbers to define color value components
-              representing intensities of its three base colors
-              <foreignphrase><emphasis
-              role="bold">R</emphasis>ed</foreignphrase>,
-              <foreignphrase><emphasis
-              role="bold">G</emphasis>reen</foreignphrase> and
-              <foreignphrase><emphasis
-              role="bold">B</emphasis>lue</foreignphrase>. The component
-              values range from 0 to 255, the latter defining maximum
-              intensity.</para>
-
-              <para>The color <quote>red</quote> for example is being
-              represented by (255, 0, 0). So the red component has maximum
-              intensity while blue and green are zero.</para>
-
-              <para>It is however common to use <link
-              xlink:href="http://www.december.com/html/spec/color16codes.html">hexadecimal
-              in favour of decimal values</link>. Thus the same color
-              <quote>red</quote> in the subsequent HTML example's heading font
-              is now being represented by <emphasis
-              role="bold">(FF,0,0)</emphasis>:</para>
+              <para>As you may know the <xref linkend="glo_RGB"/> color model uses triplets of numbers to define color value components representing intensities of its three base colors <foreignphrase><emphasis role="bold">R</emphasis>ed</foreignphrase>, <foreignphrase><emphasis role="bold">G</emphasis>reen</foreignphrase> and <foreignphrase><emphasis role="bold">B</emphasis>lue</foreignphrase>. The component values range from 0 to 255, the latter defining maximum intensity.</para>
+
+              <para>The color <quote>red</quote> for example is being represented by (255, 0, 0). So the red component has maximum intensity while blue and green are zero.</para>
+
+              <para>It is however common to use <link xlink:href="http://www.december.com/html/spec/color16codes.html">hexadecimal in favour of decimal values</link>. Thus the same color <quote>red</quote> in the subsequent HTML example's heading font is now being represented by <emphasis role="bold">(FF,0,0)</emphasis>:</para>
 
               <programlisting language="html">&lt;!DOCTYPE html&gt;
 &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
@@ -1652,8 +1351,7 @@ System.out.println('&amp;' + ": " + ((int) '&amp;'));
   &lt;body&gt;&lt;h1 style="<emphasis role="bold">color: #FF0000;</emphasis>"&gt;My heading&lt;/h1&gt;&lt;/body&gt;
 &lt;/html&gt;</programlisting>
 
-              <para>Write a program printing the hexadecimal representation
-              <inlineequation>
+              <para>Write a program printing the hexadecimal representation <inlineequation>
                   <m:math display="inline">
                     <m:msub>
                       <m:mi>C0</m:mi>
@@ -1663,8 +1361,7 @@ System.out.println('&amp;' + ": " + ((int) '&amp;'));
                   </m:math>
                 </inlineequation> as a decimal value.</para>
 
-              <para>Complete the following code by assigning the hexadecimal
-              value <inlineequation>
+              <para>Complete the following code by assigning the hexadecimal value <inlineequation>
                   <m:math display="inline">
                     <m:msub>
                       <m:mi>C0</m:mi>
@@ -1672,10 +1369,7 @@ System.out.println('&amp;' + ": " + ((int) '&amp;'));
                       <m:mi>16</m:mi>
                     </m:msub>
                   </m:math>
-                </inlineequation> (The <quote>silver</quote> color's all three
-              component's intensity in <uri
-              xlink:href="http://www.december.com/html/spec/color16codes.html">http://www.december.com/html/spec/color16codes.html</uri>)
-              to get the output in decimal representation.</para>
+                </inlineequation> (The <quote>silver</quote> color's all three component's intensity in <uri xlink:href="http://www.december.com/html/spec/color16codes.html">http://www.december.com/html/spec/color16codes.html</uri>) to get the output in decimal representation.</para>
 
               <programlisting language="java">public static void main(String[] args) {
    short intensity = ...;
@@ -1684,10 +1378,7 @@ System.out.println('&amp;' + ": " + ((int) '&amp;'));
 }</programlisting>
 
               <tip>
-                <para>You may want to consider the <quote
-                xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc6_html_2">Literals</quote>
-                section of <xref linkend="bib_Kurniawan2015"/> learning about
-                hexadecimal integer value representation.</para>
+                <para>You may want to consider the <quote xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc6_html_2">Literals</quote> section of <xref linkend="bib_Kurniawan2015"/> learning about hexadecimal integer value representation.</para>
               </tip>
             </question>
 
@@ -1712,9 +1403,7 @@ System.out.println(intensity);</programlisting>
 
               <programlisting language="java">System.out.println(048);</programlisting>
 
-              <para>This yields a compile time error <quote>Integer number too
-              large</quote>. On contrary the following code will compile and
-              run perfectly well:</para>
+              <para>This yields a compile time error <quote>Integer number too large</quote>. On contrary the following code will compile and run perfectly well:</para>
 
               <programlisting language="java">System.out.println(047);</programlisting>
 
@@ -1722,27 +1411,12 @@ System.out.println(intensity);</programlisting>
             </question>
 
             <answer>
-              <para>The literal <quote>048</quote> is meant to be octal
-              representation. Unfortunately the only digits in octal
-              representations range from 0 to 7. So <quote>047</quote> is fine
-              but <quote>048</quote> simply is no valid literal in <xref
-              linkend="glo_Java"/>.</para>
+              <para>The literal <quote>048</quote> denotes <link xlink:href="https://en.wikipedia.org/wiki/Octal">octal representation</link>. Digits in octal representation range from 0 to 7. So <quote>047</quote> is fine but <quote>048</quote> simply is invalid.</para>
             </answer>
           </qandaentry>
         </qandadiv>
       </qandaset>
 
-      <figure xml:id="sd1_fig_romanNumerals">
-        <title>Just kidding ...</title>
-
-        <programlisting language="java">int year = MMXIV; // <link
-            xlink:href="https://en.wikipedia.org/wiki/Roman_numerals">Roman numerals</link> representation
-
-System.out.println("Olympic winter games: " + year);</programlisting>
-
-        <screen>Olympic winter games: 2014</screen>
-      </figure>
-
       <qandaset defaultlabel="qanda" xml:id="sd1QandaBinaryIntLiteral">
         <title>Binary literals</title>
 
@@ -1751,10 +1425,7 @@ System.out.println("Olympic winter games: " + year);</programlisting>
             <question>
               <orderedlist>
                 <listitem>
-                  <para>Using the decimal system to represent integer values
-                  we tend to ignore other important numbering systems. Write
-                  an application which prints the decimal value of
-                  <inlineequation>
+                  <para>Using the decimal system to represent integer values we tend to ignore other important numbering systems. Write an application which prints the decimal value of <inlineequation>
                       <m:math display="inline">
                         <m:msub>
                           <m:mi>1110100100</m:mi>
@@ -1762,18 +1433,14 @@ System.out.println("Olympic winter games: " + year);</programlisting>
                           <m:mi>2</m:mi>
                         </m:msub>
                       </m:math>
-                    </inlineequation> by writing the former as a binary int
-                  literal. Verify the printed value by an independent
-                  calculation.</para>
+                    </inlineequation> by writing the former as a binary int literal. Verify the printed value by an independent calculation.</para>
                 </listitem>
 
                 <listitem>
-                  <para>Construct a second binary literal representing a
-                  negative value of your choice.</para>
+                  <para>Construct a second binary literal representing a negative value of your choice.</para>
 
                   <tip>
-                    <para>An <code>int</code> is being represented by four
-                    bytes in <xref linkend="glo_Java"/>.</para>
+                    <para>An <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> is being represented by four bytes in <xref linkend="glo_Java"/>.</para>
                   </tip>
                 </listitem>
               </orderedlist>
@@ -1799,16 +1466,7 @@ Decimal:932</screen>
                 </listitem>
 
                 <listitem>
-                  <para>A negative value in <link
-                  xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's
-                  complement</link> representation starts with a
-                  <quote>1</quote> at its highest bit. Binary literals in
-                  <xref linkend="glo_Java"/> represent <code>int</code>
-                  values. An <code>int</code> in <xref linkend="glo_Java"/>
-                  uses 4 bytes and thus occupies 4 x 8=32 bits. Therefore
-                  choosing a negative value is a simple task: Start with
-                  <quote>1</quote> and let it follow by 32 - 1 = 31 random bit
-                  values:</para>
+                  <para>A negative value in <link xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's complement</link> representation starts with a <quote>1</quote> at its highest bit. Binary literals in <xref linkend="glo_Java"/> represent <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> values. An <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> in <xref linkend="glo_Java"/> uses 4 bytes and thus occupies 4 x 8=32 bits. Therefore choosing a negative value is a simple task: Start with <quote>1</quote> and let it follow by 32 - 1 = 31 random bit values:</para>
 
                   <programlisting language="java">public static void main(String[] args) {
    System.out.println(0B10000000_00111001_01101001_01110100);
@@ -1820,15 +1478,175 @@ Decimal:932</screen>
         </qandadiv>
       </qandaset>
 
+      <qandaset defaultlabel="qanda" xml:id="sw1QandaIntLimitShort">
+        <title>Testing the limits (Difficult)</title>
+
+        <qandadiv>
+          <qandaentry>
+            <question>
+              <para>A careful programmer is worried whether a short variable is <emphasis role="bold">always</emphasis> large enough to hold color intensity values ranging from 0 to 255. Give an answer being based on the <link xlink:href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-4.html#jls-4.2.1">specification</link> and not just by <acronym>try-and-error</acronym>.</para>
+
+              <para>The programmer tries to adopt the <link linkend="sw1QandaMaxMinInt">related int example</link> accordingly:</para>
+
+              <programlisting language="java">short minumum = 0B10000000_00000000,
+      maximum = 0B01111111_11111111;
+
+System.out.println("Minimum short value:" + minumum);
+System.out.println("Maximum short value:" + maximum</programlisting>
+
+              <para>Our programmer is baffled:</para>
+
+              <itemizedlist>
+                <listitem>
+                  <para>The first assignment <code language="java">minumum = 0B10000000_00000000</code> is being flagged as a compile time error:</para>
+
+                  <para><computeroutput>Type mismatch: cannot convert from int to short</computeroutput></para>
+                </listitem>
+
+                <listitem>
+                  <para>On contrary the second assignment <code language="java">maximum = 0B01111111_11111111</code> gets smoothly accepted.</para>
+                </listitem>
+              </itemizedlist>
+
+              <tip>
+                <para>Which integer literal types do exist according to the <xref linkend="glo_Java"/> <link xlink:href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-3.10.1">standard</link>?</para>
+              </tip>
+            </question>
+
+            <answer>
+              <para>Since variables of type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> have a two bytes representation their corresponding range is <inlineequation>
+                  <m:math display="inline">
+                    <m:mrow>
+                      <m:mo>[</m:mo>
+
+                      <m:mrow>
+                        <m:mrow>
+                          <m:mo>-</m:mo>
+
+                          <m:msup>
+                            <m:mi>2</m:mi>
+
+                            <m:mi>15</m:mi>
+                          </m:msup>
+                        </m:mrow>
+
+                        <m:mo>,</m:mo>
+
+                        <m:mrow>
+                          <m:msup>
+                            <m:mi>2</m:mi>
+
+                            <m:mi>15</m:mi>
+                          </m:msup>
+
+                          <m:mo>-</m:mo>
+
+                          <m:mi>1</m:mi>
+                        </m:mrow>
+                      </m:mrow>
+
+                      <m:mo>]</m:mo>
+                    </m:mrow>
+                  </m:math>
+                </inlineequation>. Thus intensity values ranging from 0 to 255 will be easily accommodated.</para>
+
+              <para>The second question is more difficult to explain: The <xref linkend="glo_Java"/> standard only defines <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> literals. It does however not define <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> (or <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-A">byte</code>) literals.</para>
+
+              <para>Thus the 0B01111111_11111111 literal will be treated as an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> value being compatible with a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> variable and is thus assignable.</para>
+
+              <para>On the contrary the binary value <code>10000000_00000000</code> evaluates to <inlineequation>
+                  <m:math display="inline">
+                    <m:msup>
+                      <m:mn>2</m:mn>
+
+                      <m:mi>15</m:mi>
+                    </m:msup>
+                  </m:math>
+                </inlineequation> (equal to 32768) exceeding a two-byte (signed) short variable's upper limit.</para>
+
+              <para>Even worse: A <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> variable containing binary <code>10000000_00000000</code> due to its two byte <link xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's complement</link> representation has got a value <inlineequation>
+                  <m:math display="inline">
+                    <m:mrow>
+                      <m:mo>-</m:mo>
+
+                      <m:msup>
+                        <m:mn>2</m:mn>
+
+                        <m:mi>15</m:mi>
+                      </m:msup>
+                    </m:mrow>
+                  </m:math>
+                </inlineequation> (or -32768).</para>
+
+              <para>In order to avoid this error we need an explicit type conversion (a so called cast):</para>
+
+              <programlisting language="java">short minumum = (short) 0B10000000_00000000;</programlisting>
+
+              <para>Since a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> variable's range is <inlineequation>
+                  <m:math display="inline">
+                    <m:mrow>
+                      <m:mo>[</m:mo>
+
+                      <m:mrow>
+                        <m:mrow>
+                          <m:mo>-</m:mo>
+
+                          <m:msup>
+                            <m:mi>2</m:mi>
+
+                            <m:mi>15</m:mi>
+                          </m:msup>
+                        </m:mrow>
+
+                        <m:mo>,</m:mo>
+
+                        <m:mrow>
+                          <m:msup>
+                            <m:mi>2</m:mi>
+
+                            <m:mi>15</m:mi>
+                          </m:msup>
+
+                          <m:mo>-</m:mo>
+
+                          <m:mi>1</m:mi>
+                        </m:mrow>
+                      </m:mrow>
+
+                      <m:mo>]</m:mo>
+                    </m:mrow>
+                  </m:math>
+                </inlineequation> we may as well use a unary minus sign instead:</para>
+
+              <programlisting language="java">short minumum = -0B10000000_00000000;</programlisting>
+
+              <para>Both variants are syntactically correct and will thus compile. However they are likely not being intended by our programmer.</para>
+
+              <para>The error in the first place is probably assigning a value of <inlineequation>
+                  <m:math display="inline">
+                    <m:mrow>
+                      <m:mo>+</m:mo>
+
+                      <m:msup>
+                        <m:mi>2</m:mi>
+
+                        <m:mi>15</m:mi>
+                      </m:msup>
+                    </m:mrow>
+                  </m:math>
+                </inlineequation> to a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> variable at all.</para>
+            </answer>
+          </qandaentry>
+        </qandadiv>
+      </qandaset>
+
       <qandaset defaultlabel="qanda" xml:id="sd1QandaBracesInPrintln">
-        <title>Why using braces inside <code>System.out.println(...)</code>
-        ?</title>
+        <title>Why using braces inside <code>System.out.println(...)</code> ?</title>
 
         <qandadiv>
           <qandaentry>
             <question>
-              <para>Solution <xref linkend="sd1QandaBinaryIntLiteral"/>
-              contains:</para>
+              <para>Solution <xref linkend="sd1QandaBinaryIntLiteral"/> contains:</para>
 
               <programlisting language="java">...
 System.out.println("Decimal:" +  (512 +
@@ -1837,20 +1655,16 @@ System.out.println("Decimal:" +  (512 +
                                        32 +
                                           4)); ...</programlisting>
 
-              <para>Why are the <quote>inner</quote> braces immediately
-              preceding 512 and following 4 are being required?</para>
+              <para>Why are the <quote>inner</quote> braces immediately preceding 512 and following 4 are being required?</para>
 
               <tip>
                 <itemizedlist>
                   <listitem>
-                    <para>Execute the above code omitting the
-                    <quote>inner</quote> braces.</para>
+                    <para>Execute the above code omitting the <quote>inner</quote> braces.</para>
                   </listitem>
 
                   <listitem>
-                    <para>Read about the <quote>+</quote> operator's role e.g.
-                    in <code>System.out.println("Some" + "
-                    string").</code></para>
+                    <para>Read about the <quote>+</quote> operator's role e.g. in <code>System.out.println("Some" + " string").</code></para>
                   </listitem>
                 </itemizedlist>
               </tip>
@@ -1871,8 +1685,7 @@ System.out.println("Decimal:" +  512 +
               <screen>...
 Decimal:512256128324</screen>
 
-              <para>The numbers are being treated as strings rather than
-              integer values The above code is equivalent to:</para>
+              <para>The numbers are being treated as strings rather than integer values The above code is equivalent to:</para>
 
               <programlisting language="java">...
 System.out.println("Decimal:" +  "512" +
@@ -1881,46 +1694,24 @@ System.out.println("Decimal:" +  "512" +
                                           "32" +
                                              "4"); ...</programlisting>
 
-              <para>The <quote>+</quote> operator between two strings defines
-              their concatenation. So all six components get joined into a
-              single result string.</para>
+              <para>The <quote>+</quote> operator between two strings defines their concatenation. So all six components get joined into a single result string.</para>
 
-              <para>Supplying additional inner braces defines an expression
-              (512 + 256 + 128 + 32 + 4) solely involving integer values. In
-              this context each <quote>+</quote> operator effects the usual
-              integer arithmetic:</para>
+              <para>Supplying additional inner braces defines an expression (512 + 256 + 128 + 32 + 4) solely involving integer values. In this context each <quote>+</quote> operator effects the usual integer arithmetic:</para>
 
               <programlisting language="java">...
-System.out.println("Decimal:" +<co linkends="sd1ListingPlusOpDuplicate-1"
-                  xml:id="sd1ListingPlusOpDuplicate-1-co"/> (512 +<co
-                  linkends="sd1ListingPlusOpDuplicate-2"
-                  xml:id="sd1ListingPlusOpDuplicate-2-co"/>
-                                      256 +<co
-                  linkends="sd1ListingPlusOpDuplicate-2"
-                  xml:id="sd1ListingPlusOpDuplicate-3-co"/>
-                                         128 +<co
-                  linkends="sd1ListingPlusOpDuplicate-2"
-                  xml:id="sd1ListingPlusOpDuplicate-4-co"/>
-                                            32 +<co
-                  linkends="sd1ListingPlusOpDuplicate-2"
-                  xml:id="sd1ListingPlusOpDuplicate-5-co"/>
+System.out.println("Decimal:" +<co linkends="sd1ListingPlusOpDuplicate-1" xml:id="sd1ListingPlusOpDuplicate-1-co"/> (512 +<co linkends="sd1ListingPlusOpDuplicate-2" xml:id="sd1ListingPlusOpDuplicate-2-co"/>
+                                      256 +<co linkends="sd1ListingPlusOpDuplicate-2" xml:id="sd1ListingPlusOpDuplicate-3-co"/>
+                                         128 +<co linkends="sd1ListingPlusOpDuplicate-2" xml:id="sd1ListingPlusOpDuplicate-4-co"/>
+                                            32 +<co linkends="sd1ListingPlusOpDuplicate-2" xml:id="sd1ListingPlusOpDuplicate-5-co"/>
                                                4)); ...</programlisting>
 
               <calloutlist>
-                <callout arearefs="sd1ListingPlusOpDuplicate-1-co"
-                         xml:id="sd1ListingPlusOpDuplicate-1">
-                  <para><quote>+</quote> operator concatenating the two
-                  strings <code>"Decimal:"</code> and
-                  <code>"932"</code>.</para>
+                <callout arearefs="sd1ListingPlusOpDuplicate-1-co" xml:id="sd1ListingPlusOpDuplicate-1">
+                  <para><quote>+</quote> operator concatenating the two strings <code>"Decimal:"</code> and <code>"932"</code>.</para>
                 </callout>
 
-                <callout arearefs="sd1ListingPlusOpDuplicate-2-co sd1ListingPlusOpDuplicate-3-co sd1ListingPlusOpDuplicate-4-co sd1ListingPlusOpDuplicate-5-co"
-                         xml:id="sd1ListingPlusOpDuplicate-2">
-                  <para><quote>+</quote> operators computing the integer sum
-                  of 512, 256, 128, 32 and 4 yielding a value of 932. This
-                  value subsequently gets transformed into the String
-                  <code>"932"</code> in order to be compatible with the
-                  preceding <code>"Decimal:"</code> string.</para>
+                <callout arearefs="sd1ListingPlusOpDuplicate-2-co sd1ListingPlusOpDuplicate-3-co sd1ListingPlusOpDuplicate-4-co sd1ListingPlusOpDuplicate-5-co" xml:id="sd1ListingPlusOpDuplicate-2">
+                  <para><quote>+</quote> operators computing the integer sum of 512, 256, 128, 32 and 4 yielding a value of 932. This value subsequently gets transformed into the String <code>"932"</code> in order to be compatible with the preceding <code>"Decimal:"</code> string.</para>
                 </callout>
               </calloutlist>
             </answer>
@@ -1934,18 +1725,12 @@ System.out.println("Decimal:" +<co linkends="sd1ListingPlusOpDuplicate-1"
         <qandadiv>
           <qandaentry>
             <question>
-              <para>Referring to <xref linkend="sd1_fig_unicodeSample"/> we
-              may use a corresponding <link
-              xlink:href="https://en.wikibooks.org/wiki/Java_Programming/Literals#Character_Literals">character
-              literal</link> representing Arabic:</para>
+              <para>Referring to <xref linkend="sd1_fig_unicodeSample"/> we may use a corresponding <link xlink:href="https://en.wikibooks.org/wiki/Java_Programming/Literals#Character_Literals">character literal</link> representing Arabic:</para>
 
-              <programlisting language="java">final char arabicChar = 'ڜ'; // A <link
-                  xlink:href="https://en.wikibooks.org/wiki/Java_Programming/Literals#Character_Literals">character literal</link>
+              <programlisting language="java">final char arabicChar = 'ڜ'; // A <link xlink:href="https://en.wikibooks.org/wiki/Java_Programming/Literals#Character_Literals">character literal</link>
 System.out.println("Character: " + arabicChar);</programlisting>
 
-              <para>Execution yields the expected output. On contrary the
-              following code snippet using the smiley instead does not even
-              compile:</para>
+              <para>Execution yields the expected output. On contrary the following code snippet using the smiley instead does not even compile:</para>
 
               <mediaobject>
                 <imageobject>
@@ -1956,20 +1741,14 @@ System.out.println("Character: " + arabicChar);</programlisting>
               <para>Explain the underlying problem.</para>
 
               <tip>
-                <para>Consider the number of bytes being allocated for
-                <code>char</code> values in <xref linkend="glo_Java"/>.</para>
+                <para>Consider the number of bytes being allocated for representing <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code> values in <xref linkend="glo_Java"/>.</para>
               </tip>
             </question>
 
             <answer>
-              <para>According to the <link
-              xlink:href="https://en.wikipedia.org/wiki/Arabic_(Unicode_block)#Block">Arabic
-              block</link> table the code point of <code>'ڜ'</code> is U+069C
-              having a decimal equivalent of 1692.</para>
-
-              <para><xref linkend="glo_Java"/> uses two bytes equivalent to 16
-              bits for representing positive <code>char</code> values. Thus
-              the largest representable code point value is <inlineequation>
+              <para>According to the <link xlink:href="https://en.wikipedia.org/wiki/Arabic_(Unicode_block)#Block">Arabic block</link> table the code point of <code>'ڜ'</code> is U+069C having a decimal equivalent of 1692.</para>
+
+              <para><xref linkend="glo_Java"/> uses two bytes equivalent to 16 bits for representing positive <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code> values. Thus the largest representable code point value is <inlineequation>
                   <m:math display="inline">
                     <m:mrow>
                       <m:mrow>
@@ -1989,18 +1768,23 @@ System.out.println("Character: " + arabicChar);</programlisting>
                       <m:mi>65535</m:mi>
                     </m:mrow>
                   </m:math>
-                </inlineequation>. So <code>'ڜ'</code> fits well into this
-              range.</para>
-
-              <para>According to the <link
-              xlink:href="https://en.wikipedia.org/wiki/Emoticons_(Unicode_block)">Emoticons
-              table</link> the smiley's code point value is U+1F60E being
-              equivalent to 128526 decimal. This exceeds the limit of 65535
-              and thus prohibits the character literal in question.</para>
+                </inlineequation>. So <code>'ڜ'</code> fits well into this range.</para>
+
+              <para>According to the <link xlink:href="https://en.wikipedia.org/wiki/Emoticons_(Unicode_block)">Emoticons table</link> the smiley's code point value is U+1F60E being equivalent to 128526 decimal. This exceeds the limit of 65535 and thus prohibits the character literal in question.</para>
             </answer>
           </qandaentry>
         </qandadiv>
       </qandaset>
+
+      <figure xml:id="sd1_fig_romanNumerals">
+        <title>Just kidding ...</title>
+
+        <programlisting language="java">int year = MMXIV; // <link xlink:href="https://en.wikipedia.org/wiki/Roman_numerals">Roman numerals</link> representation
+
+System.out.println("Olympic winter games: " + year);</programlisting>
+
+        <screen>Olympic winter games: 2014</screen>
+      </figure>
     </section>
 
     <section xml:id="sd1_sect_arithmeticLimitations">
@@ -2040,9 +1824,7 @@ _____________________________________
         </informaltable>
       </figure>
 
-      <para>Why not using float / double in favour of bounded
-      <code>byte</code>, <code>short</code>, <code>int</code>,
-      <code>long</code> for arithmetics?</para>
+      <para>Why not using float / double in favour of bounded <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-A">byte</code>, <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code>, <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code>, <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> for arithmetics?</para>
 
       <figure xml:id="sd1_fig_floatPrecision">
         <title>Limited precision</title>
@@ -2061,8 +1843,7 @@ Expected value: 9223372036854775807</screen>
       </figure>
 
       <figure xml:id="sd1_fig_floatConverter">
-        <title><uri
-        xlink:href="https://www.h-schmidt.net/FloatConverter">https://www.h-schmidt.net/FloatConverter</uri></title>
+        <title><uri xlink:href="https://www.h-schmidt.net/FloatConverter">FloatConverter</uri></title>
 
         <mediaobject>
           <imageobject>
@@ -2071,432 +1852,124 @@ Expected value: 9223372036854775807</screen>
         </mediaobject>
       </figure>
     </section>
-  </section>
-
-  <section xml:id="sd1_sect_langFundamental_exercises">
-    <title>Exercises</title>
 
-    <section xml:id="sw1SectSimpleExpressions">
-      <title>Simple expressions</title>
+    <section xml:id="sectConversions">
+      <title>Conversions</title>
 
-      <qandaset defaultlabel="qanda" xml:id="sw1QandaGuessingResults">
-        <title>Guessing results</title>
+      <figure xml:id="fig_WideningByte2Short">
+        <title>Widening from <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-A">byte</code> to <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code></title>
 
-        <qandadiv>
-          <qandaentry>
-            <question>
-              <para>Consider the following code segment:</para>
+        <mediaobject>
+          <imageobject>
+            <imagedata fileref="Ref/LangFundament/byte2short.svg"/>
+          </imageobject>
+        </mediaobject>
+      </figure>
 
-              <programlisting language="java">      int a = 3;
-      a++;          //Incrementing a by 1 --&gt; a==4
+      <figure xml:id="fig_WideningChar2Short">
+        <title>Widening from <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code> to <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code></title>
 
-      int b = a;    // TODO
-
-      b--;          // TODO
-      --b;          // TODO
-
-      int c = b;    // TODO
-
-      b = ++a;      // TODO
-      int e = a++;  // TODO
-
-      a *= b;       // TODO
-
-      System.out.println("a=" + a);
-      System.out.println("b=" + b);
-      System.out.println("c=" + c);
-      System.out.println("e=" + e);</programlisting>
-
-              <para>We want to guess the expected result. Copy/paste the above
-              code into a main() method body within your IDE of choice
-              (probably Eclipse).</para>
-
-              <para><emphasis role="bold">Do not execute this code
-              yet</emphasis> but replace the <quote>// TODO</quote> comments
-              by guessing the respective variable's value beforehand:</para>
-
-              <para><computeroutput>a=...</computeroutput></para>
-
-              <para><computeroutput>b=...</computeroutput></para>
-
-              <para><computeroutput>c=...</computeroutput></para>
-
-              <para><computeroutput>e=...</computeroutput></para>
-
-              <para>After finishing your guesses execute your code and
-              (possibly) start wailing about your success rate.</para>
-
-              <tip>
-                <para>Both <code>x++</code> (postfix notation) and
-                <code>++x</code> (infix notation) are expressions themselves
-                which might even be rewritten as <code>(x++)</code> and
-                <code>(++x)</code> for the sake of clarity. The difference is
-                not about operator precedence rules but simply about the
-                values of these expressions when being assigned to other
-                variables.</para>
-              </tip>
-            </question>
-
-            <answer>
-              <para>As inferred by the hint the biggest problem is about
-              understanding postfix and infix notation of the operators
-              <code>++</code> and <code>--</code>. A corresponding expression
-              evaluates to:</para>
-
-              <itemizedlist>
-                <listitem>
-                  <para><code>a = x++</code> yields a ==x: The value of x
-                  <emphasis role="bold">before</emphasis> incrementing
-                  it.</para>
-                </listitem>
-
-                <listitem>
-                  <para><code>a = ++x</code> yields a ==(x + 1): The value of
-                  x <emphasis role="bold">after</emphasis> incrementing
-                  it.</para>
-                </listitem>
-              </itemizedlist>
-
-              <para>The rest is just obeying the <quote>due diligence</quote>
-              rule set:</para>
-
-              <programlisting language="java">      int a = 3;
-      a++;          //Incrementing a by 1 --&gt; a==4
-
-      int b = a;    // Assigning value of a --&gt; b==4
-
-      b--;          // Decrementing b by 1 --&gt; b==3
-      --b;          // Decrementing b by 1 --&gt; b==2
-
-      int c = b;    // c == 2;
-
-      b = ++a;      // Incrementing a by 1 --&gt;a==5, then assigning to b --&gt; b == 5
-      int e = a++;  // Assigning a to e --&gt; e==5, then incrementing a --&gt; a==6 
-
-      a *= b;       // Multiplying a with b and assigning the result to a --&gt; a==30
-
-      System.out.println("a=" + a);
-      System.out.println("b=" + b);
-      System.out.println("c=" + c);
-      System.out.println("e=" + e);</programlisting>
-            </answer>
-          </qandaentry>
-        </qandadiv>
-      </qandaset>
-
-      <qandaset defaultlabel="qanda" xml:id="sw1QandaCircleArea">
-        <title>Calculating a circle area</title>
-
-        <qandadiv>
-          <qandaentry>
-            <question>
-              <para>The area <inlineequation>
-                  <m:math display="inline">
-                    <m:mi>a</m:mi>
-                  </m:math>
-                </inlineequation> of a given circle having radius
-              <inlineequation>
-                  <m:math display="inline">
-                    <m:mi>r</m:mi>
-                  </m:math>
-                </inlineequation> is being obtained by <inlineequation>
-                  <m:math display="inline">
-                    <m:mrow>
-                      <m:mi>a</m:mi>
-
-                      <m:mo>=</m:mo>
-
-                      <m:mrow>
-                        <m:mi>Ï€</m:mi>
-
-                        <m:mo>×</m:mo>
-
-                        <m:msup>
-                          <m:mi>r</m:mi>
-
-                          <m:mi>2</m:mi>
-                        </m:msup>
-                      </m:mrow>
-                    </m:mrow>
-                  </m:math>
-                </inlineequation>. Complete the following code to calculate
-              the result and write it to standard output using
-              <code>System.out.println(...)</code>:</para>
-
-              <programlisting language="java">public static void main(String[] args) {
-      
-   double radius = 2.31;   // A circle having a radius (given e.g. in mm).
-   double pi = 3.1415926;  // Constant relating a circle's radius, 
-                           //perimeter and area.
- 
-   // TODO: Write the circle's area to standard output     
-}</programlisting>
-
-              <tip>
-                <para>You may want to read the <link
-                xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc1_html_4">overview
-                section</link> on statements.</para>
-              </tip>
-            </question>
-
-            <answer>
-              <glosslist>
-                <glossentry>
-                  <glossterm>Using a mere expression</glossterm>
-
-                  <glossdef>
-                    <programlisting language="java">public static void main(String[] args) {
-      
-   double radius = 2.31;   // A circle having a radius (given e.g. in mm).
-   double pi = 3.1415926;  // Constant relating a circle's radius,
-                           //perimeter and area.
-      
-   System.out.println(pi * radius * radius);
-}</programlisting>
-                  </glossdef>
-                </glossentry>
-
-                <glossentry>
-                  <glossterm>Using a variable</glossterm>
-
-                  <glossdef>
-                    <para>Instead of immediately using the expression as an
-                    argument to <code>System.out.println(...)</code> we may
-                    assign its value to a variable prior to output
-                    creation:</para>
-
-                    <programlisting language="java">public static void main(String[] args) {
-      
-   double radius = 2.31;   // A circle having a radius (given e.g. in mm).
-   double pi = 3.1415926;  // Constant relating a circle's radius, 
-                           //perimeter and area.
-      
-   double area = pi * radius * radius;
-   System.out.println(area);
-}</programlisting>
-                  </glossdef>
-                </glossentry>
-              </glosslist>
-            </answer>
-          </qandaentry>
-        </qandadiv>
-      </qandaset>
-
-      <qandaset defaultlabel="qanda" xml:id="sd1QandaTemperatureConvert">
-        <title>Converting temperature values</title>
-
-        <qandadiv>
-          <qandaentry>
-            <question>
-              <para>Write an application converting temperature values being
-              represented as degree centigrade to kelvin and
-              Fahrenheit:</para>
-
-              <programlisting language="java">  public static void main(String[] args) {
-
-    double temperatureCelsius = 23.2;
-    
-      ...
-        
-    System.out.println("Celsius: " + temperatureCelsius);
-    System.out.println("Kelvin: " + temperatureKelvin);
-    System.out.println("Fahrenheit: " + temperatureFahrenheit);
-  }</programlisting>
-            </question>
+        <mediaobject>
+          <imageobject>
+            <imagedata fileref="Ref/LangFundament/char2short.svg"/>
+          </imageobject>
+        </mediaobject>
+      </figure>
 
-            <answer>
-              <programlisting language="java">  public static void main(String[] args) {
+      <figure xml:id="fig_NarrowingInt2Char">
+        <title>Narrowing from <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> to <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code></title>
 
-    double temperatureCelsius = 23.2;
-    
-    double 
-      temperatureKelvin = temperatureCelsius + 273.15,
-      temperatureFahrenheit = 9 * temperatureCelsius / 5 + 32;
-        
-    System.out.println("Celsius: " + temperatureCelsius);
-    System.out.println("Kelvin: " + temperatureKelvin);
-    System.out.println("Fahrenheit: " + temperatureFahrenheit);
-  }</programlisting>
-            </answer>
-          </qandaentry>
-        </qandadiv>
-      </qandaset>
+        <mediaobject>
+          <imageobject>
+            <imagedata fileref="Ref/LangFundament/int2char.svg"/>
+          </imageobject>
+        </mediaobject>
+      </figure>
 
-      <qandaset defaultlabel="qanda" xml:id="sd1QandaTimeUnits">
-        <title>Time unit conversion</title>
+      <qandaset defaultlabel="qanda" xml:id="qandaNarrowingInt2Char">
+        <title><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> to <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code> narrowing problems</title>
 
         <qandadiv>
           <qandaentry>
             <question>
-              <para>This exercise consists of two parts:</para>
+              <para>Reconsidering <xref linkend="fig_NarrowingInt2Char"/> we observe the following two related snippets yielding compile time errors</para>
 
               <orderedlist>
                 <listitem>
-                  <para>Write an application converting a (seconds, minutes
-                  ,hours) time specification to seconds:</para>
-
-                  <programlisting language="java">  public static void main(String[] args) {
-
-    final int
-      seconds = 31,
-      minutes = 16,
-      hours = 4;
-    
-    int timeInSeconds ...
-    
-    System.out.println("Time in seconds:" + timeInSeconds);
-  }</programlisting>
-
-                  <para>The expected output reads:</para>
-
-                  <screen>Time in seconds:15391</screen>
+                  <programlisting language="java">int i = 65;
+char c = i;</programlisting>
                 </listitem>
 
                 <listitem>
-                  <para>Reverse the previous part of this exercise: Convert a
-                  time specification in seconds to (seconds, minutes ,hours)
-                  as in:</para>
+                  <programlisting language="java">char c = 66200;</programlisting>
 
-                  <programlisting language="java">  public static void main(String[] args) {
+                  <para>On contrary the following code compiles well:</para>
 
-    final int timeInSeconds = 15391;
-    
-    ...
-    
-    System.out.println("Hours:" +  hours);
-    System.out.println("Minutes:" +  minutes);
-    System.out.println("Seconds:" +  seconds);
-  }</programlisting>
-
-                  <para>The expected output reads:</para>
-
-                  <screen>Hours:4
-Minutes:16
-Seconds:31</screen>
-
-                  <tip>
-                    <para>Consider the <link
-                    xlink:href="https://docs.oracle.com/javase/tutorial/java/nutsandbolts/op1.html">remainder
-                    operator <quote>%</quote></link> (modulo operator).</para>
-                  </tip>
+                  <programlisting language="java">char c = 64200;</programlisting>
                 </listitem>
               </orderedlist>
+
+              <para>Explain these errors and their underlying reasons and provide a solution if possible.</para>
+
+              <tip>
+                <para>Which data types are involved? Think about narrowing conversions and <link xlink:href="http://www.studytonight.com/java/type-casting-in-java">type casting</link>.</para>
+              </tip>
             </question>
 
             <answer>
-              <orderedlist>
+              <itemizedlist>
                 <listitem>
-                  <para>A straightforward solution reads:</para>
+                  <para>Assigning an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> to a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code> variable effectively narrows from four to two bytes and is thus prohibited. A fix requires an explicit type cast:</para>
 
-                  <para><programlisting language="java">  public static void main(String[] args) {
-
-    final int
-      seconds = 31,
-      minutes = 16,
-      hours = 4;
-    
-    final int timeInSeconds = seconds + 60 * (minutes + 60 * hours);
-    
-    System.out.println("Time in seconds:" + timeInSeconds);
-  }</programlisting></para>
+                  <programlisting language="java">int i = 65;
+char c = (char) i;</programlisting>
                 </listitem>
 
                 <listitem>
-                  <programlisting language="java">  public static void main(String[] args) {
-
-    final int timeInSeconds = 15391;
-    
-    final int minutesRemaining = timeInSeconds / 60;
-    final int seconds = timeInSeconds % 60;
-    
-    final int hours = minutesRemaining / 60;
-    final int minutes = minutesRemaining % 60;
-    
-    System.out.println("Hours:" +  hours);
-    System.out.println("Minutes:" +  minutes);
-    System.out.println("Seconds:" +  seconds);
-  }</programlisting>
+                  <para>We consider the binary representations of 66200 and 64200:</para>
+
+                  <programlisting language="java">System.out.println(Integer.toBinaryString(66200)); // Yields 1_00000010_10011000
+System.out.println(Integer.toBinaryString(64200)); // Yields   11111010_11001000</programlisting>
+
+                  <para>Thus 64200 fits into a two byte <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-E">char</code> whereas 66200 does not.</para>
                 </listitem>
-              </orderedlist>
+              </itemizedlist>
             </answer>
           </qandaentry>
         </qandadiv>
       </qandaset>
 
-      <qandaset defaultlabel="qanda" xml:id="sd1_qanda_typeAssignCompat">
-        <title>Assignment and type safety</title>
+      <qandaset defaultlabel="qanda" xml:id="qandaNarrowing137toByte">
+        <title><code>Get a byte from 137</code></title>
 
         <qandadiv>
           <qandaentry>
             <question>
-              <para>We consider:</para>
-
-              <programlisting language="java">int i = -21;
-double d = i;</programlisting>
-
-              <para>This snippet shows perfectly correct <xref
-              linkend="glo_Java"/> code. However <xref
-              linkend="sd1_fig_typeSafety"/> suggests we should not be allowed
-              to assign an <code>int</code> to a <code>double</code> value due
-              to type safety.</para>
-
-              <para>Even worse: Swapping types yields a compile time
-              error:</para>
+              <para>Consider:</para>
 
-              <programlisting language="java">double d = 2.4;
-int i = d; // Error: Incompatible types</programlisting>
+              <programlisting language="java">int i = 139;
+byte b = (byte) i;
+System.out.println(b);</programlisting>
 
-              <para>Why is this? Make an educated guess.</para>
+              <para>Explain in detail why execution results in a value of <computeroutput>-117</computeroutput>.</para>
             </question>
 
             <answer>
-              <para>The first snippet compiles by using the widening
-              conversion: When assigning <code>d = i</code> the <xref
-              linkend="glo_Java"/> compiler implicitly converts the
-              <code>int</code> into a <code>double</code> value.</para>
-
-              <para>Turning a double into an int is more cumbersome: The
-              expression <code>i = 3.5</code> could be evaluated by agreeing
-              on a specific rounding prescription. But what about i =
-              3457357385783573478955345.45? A <xref linkend="glo_Java"/>
-              <code>int</code>'s maximum value is <inlineequation>
-                  <m:math display="inline">
-                    <m:mrow>
-                      <m:msup>
-                        <m:mi>2</m:mi>
-
-                        <m:mi>31</m:mi>
-                      </m:msup>
-
-                      <m:mo>-</m:mo>
-
-                      <m:mi>1</m:mi>
-                    </m:mrow>
-                  </m:math>
-                </inlineequation>exceeding the former <code>double</code>
-              value.</para>
-
-              <para>Conclusion: <xref linkend="glo_Java"/> disallows double to
-              int assignments unless using a so called cast (explicit type
-              conversion):</para>
+              <para>A four byte <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> representation of 139 reads <code>00000000_00000000_00000000_10001011</code>. The cast <code>b = (byte) i</code> will strip the leading three bytes leaving <code>b</code> containing <code>10001011</code>.</para>
 
-              <programlisting language="java">double d = 2.4;
-int i = (int) d; // Explicit cast double to int</programlisting>
+              <para>Since byte values in <xref linkend="glo_Java"/> are being represented as signed values using two-complement notation the result is -117.</para>
             </answer>
           </qandaentry>
         </qandadiv>
       </qandaset>
 
       <qandaset defaultlabel="qanda" xml:id="sd1QandaLong2Float">
-        <title>Reducing <code>long</code> to <code>int</code></title>
+        <title>Reducing <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> to <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> (difficult)</title>
 
         <qandadiv>
           <qandaentry>
             <question>
-              <para>Joe programmer intends to map positive <code>long</code>
-              values to <code>int</code> values. This requires scaling down
-              <quote>half</quote> the <code>long</code> data type's range
-              <inlineequation>
+              <para>For changing a map's scale from fine to coarse Joe programmer intends to map positive <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> values to <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> values. This requires scaling down <quote>half</quote> the <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> data type's range <inlineequation>
                   <m:math display="inline">
                     <m:mrow>
                       <m:mo>[</m:mo>
@@ -2522,8 +1995,7 @@ int i = (int) d; // Explicit cast double to int</programlisting>
                       <m:mo>]</m:mo>
                     </m:mrow>
                   </m:math>
-                </inlineequation> to the <code>int</code>'s range of
-              <inlineequation>
+                </inlineequation> to the <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code>'s range of <inlineequation>
                   <m:math display="inline">
                     <m:mrow>
                       <m:mo>[</m:mo>
@@ -2567,11 +2039,11 @@ int i = (int) d; // Explicit cast double to int</programlisting>
                 </tr>
 
                 <tr>
-                  <th><code>long</code></th>
+                  <th><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code></th>
 
                   <th><code>remark</code></th>
 
-                  <th><code>int</code></th>
+                  <th><code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code></th>
 
                   <th>remark</th>
                 </tr>
@@ -2691,10 +2163,7 @@ int i = (int) d; // Explicit cast double to int</programlisting>
                           <m:mi>2</m:mi>
                         </m:mrow>
                       </m:math>
-                    </inlineequation> or <code
-                  xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MAX_VALUE"><varname
-                  xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MAX_VALUE">Long.MAX_VALUE</varname></code>
-                  - 1</td>
+                    </inlineequation> or <code xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MAX_VALUE"><varname xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MAX_VALUE">Long.MAX_VALUE</varname></code> - 1</td>
 
                   <td align="right">2147483647</td>
 
@@ -2712,8 +2181,7 @@ int i = (int) d; // Explicit cast double to int</programlisting>
                           <m:mi>1</m:mi>
                         </m:mrow>
                       </m:math>
-                    </inlineequation> or <varname
-                  xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MAX_VALUE">Integer.MAX_VALUE</varname></td>
+                    </inlineequation> or <varname xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MAX_VALUE">Integer.MAX_VALUE</varname></td>
                 </tr>
 
                 <tr>
@@ -2733,8 +2201,7 @@ int i = (int) d; // Explicit cast double to int</programlisting>
                           <m:mi>1</m:mi>
                         </m:mrow>
                       </m:math>
-                    </inlineequation> or <varname
-                  xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MAX_VALUE">Long.MAX_VALUE</varname></td>
+                    </inlineequation> or <varname xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Long.MAX_VALUE">Long.MAX_VALUE</varname></td>
 
                   <td align="right">2147483647</td>
 
@@ -2752,13 +2219,11 @@ int i = (int) d; // Explicit cast double to int</programlisting>
                           <m:mi>1</m:mi>
                         </m:mrow>
                       </m:math>
-                    </inlineequation> or <varname
-                  xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MAX_VALUE">Integer.MAX_VALUE</varname></td>
+                    </inlineequation> or <varname xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MAX_VALUE">Integer.MAX_VALUE</varname></td>
                 </tr>
               </informaltable>
 
-              <para>Joe's idea is dividing <code>long</code> values by
-              <inlineequation>
+              <para>Joe's idea is dividing <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> values by <inlineequation>
                   <m:math display="inline">
                     <m:msup>
                       <m:mi>2</m:mi>
@@ -2778,8 +2243,7 @@ int i = (int) d; // Explicit cast double to int</programlisting>
                       </m:msup>
                     </m:mrow>
                   </m:math>
-                </inlineequation> will be reduced to the intended value of
-              <inlineequation>
+                </inlineequation> will be reduced to the intended value of <inlineequation>
                   <m:math display="inline">
                     <m:mrow>
                       <m:mo>-</m:mo>
@@ -2799,17 +2263,13 @@ int i = (int) d; // Explicit cast double to int</programlisting>
                       <m:mi>32</m:mi>
                     </m:msup>
                   </m:math>
-                </inlineequation> seems to be equal to <code>2 * (<link
-              xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MAX_VALUE">Integer.MAX_VALUE</link>
-              + 1))</code> (why?) Joe's first attempt reads:</para>
+                </inlineequation> seems to be equal to <code>2 * (<link xlink:href="https://docs.oracle.com/javase/8/docs/api/constant-values.html#java.lang.Integer.MAX_VALUE">Integer.MAX_VALUE</link> + 1))</code> (why?) Joe's first attempt reads:</para>
 
-              <programlisting language="java" linenumbering="numbered"
-                              startinglinenumber="26">final long longValue = 2147483648L;
+              <programlisting language="java" linenumbering="numbered" startinglinenumber="26">final long longValue = 2147483648L;
 final int reducedValue = (int) (longValue / (2 * (Integer.MAX_VALUE + 1)));
 System.out.println(reducedValue);</programlisting>
 
-              <para>Unfortunately the results are not promising. This code
-              merely results in a runtime error:</para>
+              <para>Unfortunately the results are not promising. This code merely results in a runtime error:</para>
 
               <screen>/usr/lib/jvm/java-8-oracle/bin/java ...
 Exception in thread "main" java.lang.ArithmeticException: / by zero
@@ -2817,21 +2277,15 @@ Exception in thread "main" java.lang.ArithmeticException: / by zero
 
 Process finished with exit code 1</screen>
 
-              <para>Explain the underlying problem and correct Joe's
-              error.</para>
+              <para>Explain the underlying problem and correct Joe's error.</para>
 
               <tip>
-                <para>It may be helpful thinking of a smaller example before.
-                Consider hypothetic integer types <quote>TinyLong</quote> and
-                <quote>TinyInt</quote> requiring 4 and 2 bits
-                respectively.</para>
+                <para>It may be helpful thinking of a smaller example before. Consider hypothetic integer types <quote>TinyLong</quote> and <quote>TinyInt</quote> requiring four and two bits respectively.</para>
               </tip>
             </question>
 
             <answer>
-              <para>As a prerequisite we represent the scaling of a hypothetic
-              integer type <quote>TinyLong</quote> to a smaller type
-              <quote>TinyInt</quote> of 4 and 2 bits respectively:</para>
+              <para>As a prerequisite we represent the scaling of a hypothetic integer type <quote>TinyLong</quote> of four bits to a smaller type <quote>TinyInt</quote> of two bits:</para>
 
               <informaltable border="1">
                 <colgroup width="20%"/>
@@ -2856,158 +2310,563 @@ Process finished with exit code 1</screen>
 
                 <colgroup width="5%"/>
 
-                <colgroup width="5%"/>
+                <colgroup width="5%"/>
+
+                <colgroup width="5%"/>
+
+                <colgroup width="5%"/>
+
+                <colgroup width="5%"/>
+
+                <colgroup width="5%"/>
+
+                <colgroup width="5%"/>
+
+                <tr>
+                  <td><quote>TinyLong</quote>, n = 4</td>
+
+                  <td>-8</td>
+
+                  <td>-7</td>
+
+                  <td>-6</td>
+
+                  <td>-5</td>
+
+                  <td>-4</td>
+
+                  <td>-3</td>
+
+                  <td>-2</td>
+
+                  <td>-1</td>
+
+                  <td>0</td>
+
+                  <td>1</td>
+
+                  <td>2</td>
+
+                  <td>3</td>
+
+                  <td>4</td>
+
+                  <td>5</td>
+
+                  <td>6</td>
+
+                  <td>7</td>
+                </tr>
+
+                <tr>
+                  <td><quote>TinyInt</quote>, n = 2</td>
+
+                  <td colspan="4">-2</td>
+
+                  <td colspan="4">-1</td>
+
+                  <td colspan="4">0</td>
+
+                  <td colspan="4">1</td>
+                </tr>
+              </informaltable>
+
+              <para>Joe's assumption for these particular values implies dividing <quote>TinyLong</quote> values by <inlineequation>
+                  <m:math display="inline">
+                    <m:msup>
+                      <m:mi>2</m:mi>
+
+                      <m:mi>2</m:mi>
+                    </m:msup>
+                  </m:math>
+                </inlineequation> (truncating). This indeed yields the desired result for non-negative values. So why does Joe encounter a division by zero runtime exception when executing <code>longValue / (2 * (Integer.MAX_VALUE + 1))</code> ?</para>
+
+              <para>Unfortunately Joe's implementation is seriously flawed for even two reasons:</para>
+
+              <orderedlist>
+                <listitem>
+                  <para>The constant <code>Integer.MAX_VALUE</code> already suggests we will not be able to increase its value while staying as an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code>. The expression <code>Integer.MAX_VALUE + 1</code> will be evaluated using <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> rather than <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> arithmetic thus returning <code>Integer.MIN_VALUE</code> (negative!) due to an arithmetic overflow:</para>
+
+                  <programlisting language="java">  01111111_11111111_11111111_11111111
++ 00000000_00000000_00000000_00000001
+_____________________________________
+  10000000_00000000_00000000_00000000</programlisting>
+
+                  <para>The expression <code>2 * (Integer.MAX_VALUE + 1)</code> then gives rise to a second overflow error:</para>
+
+                  <programlisting language="java">  10000000_00000000_00000000_00000000
++ 10000000_00000000_00000000_00000000
+_____________________________________
+  00000000_00000000_00000000_00000000</programlisting>
+                </listitem>
+              </orderedlist>
+
+              <para>Both errors combined (surprisingly) result in a value of <code>0</code> explaining the <quote>division by zero</quote> error message. There are two possible solutions:</para>
+
+              <glosslist>
+                <glossentry>
+                  <glossterm><code>(int) (longValue / (2L * (Integer.MAX_VALUE + 1L)))</code></glossterm>
+
+                  <glossdef>
+                    <para>Introducing <code>2L</code> or <code>1L</code> (one is sufficient) in favour of simply using 2 and 1 turns both addition and multiplication into operations involving at least one long argument. Thus for both operations the <xref linkend="glo_Java"/> runtime will use <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> arithmetic returning the desired <quote>reducing</quote> factor of <inlineequation>
+                        <m:math display="inline">
+                          <m:msup>
+                            <m:mi>2</m:mi>
+
+                            <m:mi>32</m:mi>
+                          </m:msup>
+                        </m:math>
+                      </inlineequation> of type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code>.</para>
+                  </glossdef>
+                </glossentry>
+
+                <glossentry>
+                  <glossterm><code>(int) (longValue / 2 / (Integer.MAX_VALUE + 1L))</code></glossterm>
+
+                  <glossdef>
+                    <para>Same result as before.</para>
+
+                    <note>
+                      <para>This time the expression starts with <code>longValue / 2 ...</code> Since the variable <code>longValue</code> is of type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> the expression <code>longValue / 2</code> will be evaluated by the <xref linkend="glo_Java"/> runtime using <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> arithmetics. The result will subsequently be multiplied with <code>Integer.MAX_VALUE + 1L</code> again using <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> arithmetic.</para>
+                    </note>
+                  </glossdef>
+                </glossentry>
+              </glosslist>
+            </answer>
+          </qandaentry>
+        </qandadiv>
+      </qandaset>
+    </section>
+  </section>
+
+  <section xml:id="sd1SectOperator">
+    <title>Operators and expressions</title>
+
+    <figure xml:id="sd1_fig_binaryPlusOperator">
+      <title>The binary plus operator</title>
+
+      <mediaobject>
+        <imageobject>
+          <imagedata fileref="Ref/LangFundament/operatorSum.svg"/>
+        </imageobject>
+      </mediaobject>
+    </figure>
+
+    <qandaset defaultlabel="qanda" xml:id="sd1_qanda_expressionTypes">
+      <title>Expressions and type</title>
+
+      <qandadiv>
+        <qandaentry>
+          <question>
+            <para>Consider the following code segment:</para>
+
+            <programlisting language="java">short a = 4; <co linkends="sd1_co_expressionTypeIntToShort-1" xml:id="sd1_co_expressionTypeIntToShort-1-co"/>
+short sum = a + 7; <co linkends="sd1_co_expressionTypeIntToShort-2" xml:id="sd1_co_expressionTypeIntToShort-2-co"/></programlisting>
+
+            <calloutlist>
+              <callout arearefs="sd1_co_expressionTypeIntToShort-1-co" xml:id="sd1_co_expressionTypeIntToShort-1">
+                <para>Declaring a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> variable <code>a</code> assigning 4.</para>
+              </callout>
+
+              <callout arearefs="sd1_co_expressionTypeIntToShort-2-co" xml:id="sd1_co_expressionTypeIntToShort-2">
+                <para>Declaring a short variable <code>sum</code> assigning 4 + 7. This yields a compile time error <computeroutput>Type mismatch: cannot convert from int to short</computeroutput>.</para>
+              </callout>
+            </calloutlist>
+
+            <para>On contrary the following snippet will compile flawlessly:</para>
+
+            <programlisting language="java">short sum = 4 + 7; </programlisting>
+
+            <para>Explain this strange behaviour.</para>
+          </question>
+
+          <answer>
+            <para>The expression <code>a + 7</code> contains an operand of type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> to the left of the plus operator and an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> literal <code>7</code> to its right. Thus the plus operator yields an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> result (the <quote>biggest</quote> type of both operands) which cannot be assigned to the variable <code>sum</code> of type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code>.</para>
+
+            <para>The very same argument seems to apply for the expression <code>4 + 7</code> even better: This time the plus operator acts on two <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> operands. However the <xref linkend="glo_Java"/> compiler is <quote>clever</quote> enough casting the <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> result 11 to the <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-B">short</code> variable <code>sum</code> without any loss of information.</para>
+          </answer>
+        </qandaentry>
+      </qandadiv>
+    </qandaset>
+
+    <qandaset defaultlabel="qanda" xml:id="sd1_qanda_integerDivision">
+      <title>Dividing values</title>
+
+      <qandadiv>
+        <qandaentry>
+          <question>
+            <para>Consider the following statement:</para>
+
+            <programlisting language="java">System.out.println(8 / 9);</programlisting>
+
+            <para>The output is <computeroutput>0</computeroutput> rather than <code>0.888888...</code> . Explain this result.</para>
+          </question>
+
+          <answer>
+            <para>The divide operator acts on two <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> literal values 8 an 9. Thus irrespective of the underlying floating point result the resulting type is int .</para>
+
+            <para>According to <uri xlink:href="http://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html#jls-5.1.3-300-A-2">http://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html#jls-5.1.3-300-A-2</uri> the floating point value 0.88888... will be <quote>rounded toward zero</quote> yielding an int value of <code>0</code> rather than <code>1</code>.</para>
+          </answer>
+        </qandaentry>
+      </qandadiv>
+    </qandaset>
+
+    <qandaset defaultlabel="qanda" xml:id="sd1_qanda_integerSumOverflow">
+      <title>Adding values</title>
+
+      <qandadiv>
+        <qandaentry>
+          <question>
+            <para>Consider the following code:</para>
+
+            <programlisting language="java">System.out.println(2147483647 + 1);
+System.out.println(2147483647 + 1L);</programlisting>
+
+            <para>This yields:</para>
+
+            <screen>-2147483648
+2147483648</screen>
+
+            <para>Explain this result. Please refrain from answering <quote>Thats what bankers do!</quote></para>
+          </question>
+
+          <answer>
+            <para>The value 2147483647 is actually the largest possible <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> value <classname xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html">Integer</classname>.<property xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html#MAX_VALUE">MAX_VALUE</property>. The plus operator in the first expression <code>2147483647 + 1</code> acts on two operands of type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code>. Thus the resulting sum will be of type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> as well irrespective of its value.</para>
+
+            <para>On binary level adding an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> value of <code>1</code> results in:</para>
+
+            <screen>  01111111_11111111_11111111_11111111    2147483647
++ 00000000_00000000_00000000_00000001   +         1
+-------------------------------------  ------------
+  10000000_00000000_00000000_00000000   -2147483648</screen>
+
+            <para>With respect to two-complement representation of signed <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> values this is actually an overflow error: There simply is no positive <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> value of 2147483648 in <xref linkend="glo_Java"/>. See <uri xlink:href="http://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html#jls-5.1.3-220">http://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html#jls-5.1.3-220</uri> for details.</para>
+
+            <para>On contrary the plus operator in the expression <code>2147483647 + 1L</code> acts on an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> to its left and a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code> to its right. The result will thus be of type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code>:</para>
+
+            <screen>                                      01111111_11111111_11111111_11111111    2147483647
++ 00000000_00000000_00000000_00000000_00000000_00000000_00000000_00000001   +         1
+-------------------------------------------------------------------------  ------------
+  00000000_00000000_00000000_00000000_10000000_00000000_00000000_00000000    2147483648</screen>
+
+            <para>Due to a <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-D">long</code>'s larger allocation of eight rather than four bytes execution reveals no overflow problem thus yielding the expected result.</para>
+          </answer>
+        </qandaentry>
+      </qandadiv>
+    </qandaset>
+  </section>
+
+  <section xml:id="sd1_sect_langFundamental_exercises">
+    <title>Exercises</title>
+
+    <section xml:id="sw1SectSimpleExpressions">
+      <title>Simple expressions</title>
+
+      <qandaset defaultlabel="qanda" xml:id="sw1QandaGuessingResults">
+        <title>Guessing results</title>
+
+        <qandadiv>
+          <qandaentry>
+            <question>
+              <para>Consider the following code segment:</para>
+
+              <programlisting language="java">      int a = 3;
+      a++;          //Incrementing a by 1 --&gt; a==4
+
+      int b = a;    // TODO
+
+      b--;          // TODO
+      --b;          // TODO
+
+      int c = b;    // TODO
+
+      b = ++a;      // TODO
+      int e = a++;  // TODO
+
+      a *= b;       // TODO
+
+      System.out.println("a=" + a);
+      System.out.println("b=" + b);
+      System.out.println("c=" + c);
+      System.out.println("e=" + e);</programlisting>
+
+              <para>We want to guess the expected result. Copy/paste the above code into a main() method body within your IDE of choice (probably Eclipse).</para>
+
+              <para><emphasis role="bold">Do not execute this code yet</emphasis> but replace the <quote>// TODO</quote> comments by guessing the respective variable's value beforehand:</para>
+
+              <para><computeroutput>a=...</computeroutput></para>
+
+              <para><computeroutput>b=...</computeroutput></para>
+
+              <para><computeroutput>c=...</computeroutput></para>
+
+              <para><computeroutput>e=...</computeroutput></para>
+
+              <para>After finishing your guesses execute your code and (possibly) start wailing about your success rate.</para>
+
+              <tip>
+                <para>Both <code>x++</code> (postfix notation) and <code>++x</code> (infix notation) are expressions themselves which might even be rewritten as <code>(x++)</code> and <code>(++x)</code> for the sake of clarity. The difference is not about operator precedence rules but simply about the values of these expressions when being assigned to other variables.</para>
+              </tip>
+            </question>
+
+            <answer>
+              <para>As inferred by the hint the biggest problem is about understanding postfix and infix notation of the operators <code>++</code> and <code>--</code>. A corresponding expression evaluates to:</para>
+
+              <itemizedlist>
+                <listitem>
+                  <para><code>a = x++</code> yields a ==x: The value of x <emphasis role="bold">before</emphasis> incrementing it.</para>
+                </listitem>
+
+                <listitem>
+                  <para><code>a = ++x</code> yields a ==(x + 1): The value of x <emphasis role="bold">after</emphasis> incrementing it.</para>
+                </listitem>
+              </itemizedlist>
+
+              <para>The rest is just obeying the <quote>due diligence</quote> rule set:</para>
+
+              <programlisting language="java">      int a = 3;
+      a++;          //Incrementing a by 1 --&gt; a==4
+
+      int b = a;    // Assigning value of a --&gt; b==4
+
+      b--;          // Decrementing b by 1 --&gt; b==3
+      --b;          // Decrementing b by 1 --&gt; b==2
+
+      int c = b;    // c == 2;
+
+      b = ++a;      // Incrementing a by 1 --&gt;a==5, then assigning to b --&gt; b == 5
+      int e = a++;  // Assigning a to e --&gt; e==5, then incrementing a --&gt; a==6 
+
+      a *= b;       // Multiplying a with b and assigning the result to a --&gt; a==30
 
-                <colgroup width="5%"/>
+      System.out.println("a=" + a);
+      System.out.println("b=" + b);
+      System.out.println("c=" + c);
+      System.out.println("e=" + e);</programlisting>
+            </answer>
+          </qandaentry>
+        </qandadiv>
+      </qandaset>
 
-                <colgroup width="5%"/>
+      <qandaset defaultlabel="qanda" xml:id="sw1QandaCircleArea">
+        <title>Calculating a circle area</title>
 
-                <colgroup width="5%"/>
+        <qandadiv>
+          <qandaentry>
+            <question>
+              <para>The area <inlineequation>
+                  <m:math display="inline">
+                    <m:mi>a</m:mi>
+                  </m:math>
+                </inlineequation> of a given circle having radius <inlineequation>
+                  <m:math display="inline">
+                    <m:mi>r</m:mi>
+                  </m:math>
+                </inlineequation> is being obtained by <inlineequation>
+                  <m:math display="inline">
+                    <m:mrow>
+                      <m:mi>a</m:mi>
 
-                <colgroup width="5%"/>
+                      <m:mo>=</m:mo>
 
-                <colgroup width="5%"/>
+                      <m:mrow>
+                        <m:mi>Ï€</m:mi>
 
-                <tr>
-                  <td><quote>TinyLong</quote>, n = 4</td>
+                        <m:mo>×</m:mo>
 
-                  <td>-8</td>
+                        <m:msup>
+                          <m:mi>r</m:mi>
 
-                  <td>-7</td>
+                          <m:mi>2</m:mi>
+                        </m:msup>
+                      </m:mrow>
+                    </m:mrow>
+                  </m:math>
+                </inlineequation>. Complete the following code to calculate the result and write it to standard output using <code>System.out.println(...)</code>:</para>
 
-                  <td>-6</td>
+              <programlisting language="java">public static void main(String[] args) {
+      
+   double radius = 2.31;   // A circle having a radius (given e.g. in mm).
+   double pi = 3.1415926;  // Constant relating a circle's radius, 
+                           //perimeter and area.
+ 
+   // TODO: Write the circle's area to standard output     
+}</programlisting>
 
-                  <td>-5</td>
+              <tip>
+                <para>You may want to read the <link xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc1_html_4">overview section</link> on statements.</para>
+              </tip>
+            </question>
 
-                  <td>-4</td>
+            <answer>
+              <glosslist>
+                <glossentry>
+                  <glossterm>Using a mere expression</glossterm>
 
-                  <td>-3</td>
+                  <glossdef>
+                    <programlisting language="java">public static void main(String[] args) {
+      
+   double radius = 2.31;   // A circle having a radius (given e.g. in mm).
+   double pi = 3.1415926;  // Constant relating a circle's radius,
+                           //perimeter and area.
+      
+   System.out.println(pi * radius * radius);
+}</programlisting>
+                  </glossdef>
+                </glossentry>
 
-                  <td>-2</td>
+                <glossentry>
+                  <glossterm>Using a variable</glossterm>
 
-                  <td>-1</td>
+                  <glossdef>
+                    <para>Instead of immediately using the expression as an argument to <code>System.out.println(...)</code> we may assign its value to a variable prior to output creation:</para>
 
-                  <td>0</td>
+                    <programlisting language="java">public static void main(String[] args) {
+      
+   double radius = 2.31;   // A circle having a radius (given e.g. in mm).
+   double pi = 3.1415926;  // Constant relating a circle's radius, 
+                           //perimeter and area.
+      
+   double area = pi * radius * radius;
+   System.out.println(area);
+}</programlisting>
+                  </glossdef>
+                </glossentry>
+              </glosslist>
+            </answer>
+          </qandaentry>
+        </qandadiv>
+      </qandaset>
 
-                  <td>1</td>
+      <qandaset defaultlabel="qanda" xml:id="sd1QandaTemperatureConvert">
+        <title>Converting temperature values</title>
 
-                  <td>2</td>
+        <qandadiv>
+          <qandaentry>
+            <question>
+              <para>Write an application converting temperature values being represented as degree centigrade to kelvin and Fahrenheit:</para>
 
-                  <td>3</td>
+              <programlisting language="java">  public static void main(String[] args) {
 
-                  <td>4</td>
+    double temperatureCelsius = 23.2;
+    
+      ...
+        
+    System.out.println("Celsius: " + temperatureCelsius);
+    System.out.println("Kelvin: " + temperatureKelvin);
+    System.out.println("Fahrenheit: " + temperatureFahrenheit);
+  }</programlisting>
+            </question>
 
-                  <td>5</td>
+            <answer>
+              <programlisting language="java">  public static void main(String[] args) {
 
-                  <td>6</td>
+    double temperatureCelsius = 23.2;
+    
+    double 
+      temperatureKelvin = temperatureCelsius + 273.15,
+      temperatureFahrenheit = 9 * temperatureCelsius / 5 + 32;
+        
+    System.out.println("Celsius: " + temperatureCelsius);
+    System.out.println("Kelvin: " + temperatureKelvin);
+    System.out.println("Fahrenheit: " + temperatureFahrenheit);
+  }</programlisting>
+            </answer>
+          </qandaentry>
+        </qandadiv>
+      </qandaset>
 
-                  <td>7</td>
-                </tr>
+      <qandaset defaultlabel="qanda" xml:id="sd1QandaTimeUnits">
+        <title>Time unit conversion</title>
 
-                <tr>
-                  <td><quote>TinyInt</quote>, n = 2</td>
+        <qandadiv>
+          <qandaentry>
+            <question>
+              <para>This exercise consists of two parts:</para>
 
-                  <td colspan="4">-2</td>
+              <orderedlist>
+                <listitem>
+                  <para>Write an application converting a (seconds, minutes ,hours) time specification to seconds:</para>
 
-                  <td colspan="4">-1</td>
+                  <programlisting language="java">  public static void main(String[] args) {
 
-                  <td colspan="4">0</td>
+    final int
+      seconds = 31,
+      minutes = 16,
+      hours = 4;
+    
+    int timeInSeconds ...
+    
+    System.out.println("Time in seconds:" + timeInSeconds);
+  }</programlisting>
 
-                  <td colspan="4">1</td>
-                </tr>
-              </informaltable>
+                  <para>The expected output reads:</para>
 
-              <para>Joe's assumption for these particular values implies
-              dividing <quote>TinyLong</quote> values by <inlineequation>
-                  <m:math display="inline">
-                    <m:msup>
-                      <m:mi>2</m:mi>
+                  <screen>Time in seconds:15391</screen>
+                </listitem>
 
-                      <m:mi>2</m:mi>
-                    </m:msup>
-                  </m:math>
-                </inlineequation> (truncating). This indeed yields the desired
-              result for non-negative values. So why does Joe encounter a
-              division by zero runtime exception when executing
-              <code>longValue / (2 * (Integer.MAX_VALUE + 1))</code> ?</para>
+                <listitem>
+                  <para>Reverse the previous part of this exercise: Convert a time specification in seconds to (seconds, minutes ,hours) as in:</para>
 
-              <para>Unfortunately Joe's implementation is seriously flawed for
-              even two reasons:</para>
+                  <programlisting language="java">  public static void main(String[] args) {
 
-              <orderedlist>
-                <listitem>
-                  <para>The constant <code>Integer.MAX_VALUE</code> already
-                  suggests we will not be able to increase its value while
-                  staying as an <code>int</code>. The expression
-                  <code>Integer.MAX_VALUE + 1</code> will be evaluated using
-                  <code>int</code> rather than <code>long</code> arithmetic
-                  thus returning <code>Integer.MIN_VALUE</code> (negative!)
-                  due to an arithmetic overflow:</para>
+    final int timeInSeconds = 15391;
+    
+    ...
+    
+    System.out.println("Hours:" +  hours);
+    System.out.println("Minutes:" +  minutes);
+    System.out.println("Seconds:" +  seconds);
+  }</programlisting>
 
-                  <programlisting language="java">  01111111_11111111_11111111_11111111
-+ 00000000_00000000_00000000_00000001
-_____________________________________
-  10000000_00000000_00000000_00000000</programlisting>
+                  <para>The expected output reads:</para>
 
-                  <para>The expression <code>2 * (Integer.MAX_VALUE +
-                  1)</code> then gives rise to a second overflow error:</para>
+                  <screen>Hours:4
+Minutes:16
+Seconds:31</screen>
 
-                  <programlisting language="java">  10000000_00000000_00000000_00000000
-+ 10000000_00000000_00000000_00000000
-_____________________________________
-  00000000_00000000_00000000_00000000</programlisting>
+                  <tip>
+                    <para>Consider the <link xlink:href="https://docs.oracle.com/javase/tutorial/java/nutsandbolts/op1.html">remainder operator <quote>%</quote></link> (modulo operator).</para>
+                  </tip>
                 </listitem>
               </orderedlist>
+            </question>
 
-              <para>Both errors combined (surprisingly) result in a value of
-              <code>0</code> explaining the <quote>division by zero</quote>
-              error message. There are two possible solutions:</para>
-
-              <glosslist>
-                <glossentry>
-                  <glossterm><code>(int) (longValue / (2L * (Integer.MAX_VALUE
-                  + 1L)))</code></glossterm>
-
-                  <glossdef>
-                    <para>Introducing <code>2L</code> or <code>1L</code> (one
-                    is sufficient) in favour of simply using 2 and 1 turns
-                    both addition and multiplication into operations involving
-                    at least one long argument. Thus for both operations the
-                    <xref linkend="glo_Java"/> runtime will use
-                    <code>long</code> arithmetic returning the desired
-                    <quote>reducing</quote> factor of <inlineequation>
-                        <m:math display="inline">
-                          <m:msup>
-                            <m:mi>2</m:mi>
+            <answer>
+              <orderedlist>
+                <listitem>
+                  <para>A straightforward solution reads:</para>
 
-                            <m:mi>32</m:mi>
-                          </m:msup>
-                        </m:math>
-                      </inlineequation> of type <code>long</code>.</para>
-                  </glossdef>
-                </glossentry>
+                  <para><programlisting language="java">  public static void main(String[] args) {
 
-                <glossentry>
-                  <glossterm><code>(int) (longValue / 2 / (Integer.MAX_VALUE +
-                  1L))</code></glossterm>
+    final int
+      seconds = 31,
+      minutes = 16,
+      hours = 4;
+    
+    final int timeInSeconds = seconds + 60 * (minutes + 60 * hours);
+    
+    System.out.println("Time in seconds:" + timeInSeconds);
+  }</programlisting></para>
+                </listitem>
 
-                  <glossdef>
-                    <para>Same result as before.</para>
+                <listitem>
+                  <programlisting language="java">  public static void main(String[] args) {
 
-                    <note>
-                      <para>This time the expression starts with
-                      <code>longValue / 2 ...</code> Since the variable
-                      <code>longValue</code> is of type <code>long</code> the
-                      expression <code>longValue / 2</code> will be evaluated
-                      by the <xref linkend="glo_Java"/> runtime using
-                      <code>long</code> arithmetics. The result will
-                      subsequently be multiplied with <code>Integer.MAX_VALUE
-                      + 1L</code> again using <code>long</code>
-                      arithmetic.</para>
-                    </note>
-                  </glossdef>
-                </glossentry>
-              </glosslist>
+    final int timeInSeconds = 15391;
+    
+    final int minutesRemaining = timeInSeconds / 60;
+    final int seconds = timeInSeconds % 60;
+    
+    final int hours = minutesRemaining / 60;
+    final int minutes = minutesRemaining % 60;
+    
+    System.out.println("Hours:" +  hours);
+    System.out.println("Minutes:" +  minutes);
+    System.out.println("Seconds:" +  seconds);
+  }</programlisting>
+                </listitem>
+              </orderedlist>
             </answer>
           </qandaentry>
         </qandadiv>
@@ -3033,28 +2892,19 @@ _____________________________________
             </question>
 
             <answer>
-              <para>The expression <code>x == y</code> evaluates to
-              <code>false</code>. This surprising result is due to limited
-              precision regarding both <code>float</code> and
-              <code>double</code> IEEE representations: A given value will be
-              approximated as close as possible.</para>
+              <para>The expression <code>x == y</code> evaluates to <code>false</code>. This surprising result is due to limited precision regarding both <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">float</code> and <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">double</code> IEEE representations: A given value will be approximated as close as possible.</para>
 
-              <para>Adding <code>System.out.println(x - y)</code> yields a
-              value of -1.1102230246251565E-16 denoting the representational
-              deviation of <code>x</code> and <code>y</code>.</para>
+              <para>Adding <code>System.out.println(x - y)</code> yields a value of -1.1102230246251565E-16 denoting the representational deviation of <code>x</code> and <code>y</code>.</para>
 
-              <para>So we may compare <code>float</code> and
-              <code>double</code> values by providing a representational error
-              limit:</para>
+              <para>Compare <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">float</code> and <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3-100">double</code> values thus requires providing a representational error limit below which two values will be regarded as equal:</para>
 
               <programlisting language="java">final double a = 0.7;
 final double b = 0.9;
 final double x = a + 0.1;
 final double y = b - 0.1;
-System.out.println(<link
-                  xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#abs-double-">Math.abs</link>(x - y) &lt; 1.E-14);</programlisting>
+System.out.println(<link xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#abs-double-">Math.abs</link>(x - y) &lt; 1.E-14);</programlisting>
 
-              <para>This implements the boolean expression <inlineequation>
+              <para>This represents the boolean expression <inlineequation>
                   <m:math display="inline">
                     <m:mrow>
                       <m:mrow>
@@ -3096,9 +2946,7 @@ System.out.println(<link
         <qandadiv>
           <qandaentry>
             <question>
-              <para>We want to calculate the compounded interest starting from
-              an initial capital, a given annual interest rate and a duration
-              of three years. Consider the following code fragment:</para>
+              <para>We want to calculate the compounded interest starting from an initial capital, a given annual interest rate and a duration of three years. Consider the following code fragment:</para>
 
               <programlisting language="java">  public static void main(String[] args) {
 
@@ -3120,14 +2968,12 @@ Annual interest rate:1.5
 Capital after three years:233.31175902999993</screen>
 
               <tip>
-                <para>In case you are unsure read about calculating the
-                compounded interest.</para>
+                <para>In case you are unsure read about calculating the compounded interest.</para>
               </tip>
             </question>
 
             <answer>
-              <para>We obtain the compounded interest by multiplying the
-              initial capital by <inlineequation>
+              <para>We obtain the compounded interest by multiplying the initial capital by <inlineequation>
                   <m:math display="inline">
                     <m:mrow>
                       <m:mn>1</m:mn>
@@ -3143,11 +2989,9 @@ Capital after three years:233.31175902999993</screen>
                       </m:mrow>
                     </m:mrow>
                   </m:math>
-                </inlineequation> for each year where r represents the given
-              interest rate.</para>
+                </inlineequation> for each year where r represents the given interest rate.</para>
 
-              <para>Since we have not yet introduced loops this multiplication
-              has to be repeated three times:</para>
+              <para>Since we have not yet introduced loops this multiplication has to be repeated three times:</para>
 
               <programlisting language="java">  public static void main(String[] args) {
 
@@ -3167,8 +3011,7 @@ Capital after three years:233.31175902999993</screen>
     System.out.println("Capital after three years:" + capitalAtThreeYears);
   }</programlisting>
 
-              <para>We might as well use a single arithmetic expression to
-              achieve the same result:</para>
+              <para>We might as well use a single arithmetic expression to achieve the same result:</para>
 
               <programlisting language="java">  public static void main(String[] args) {
 
@@ -3185,9 +3028,7 @@ Capital after three years:233.31175902999993</screen>
     System.out.println("Capital after three years:" + capitalAtThreeYears);
   }</programlisting>
 
-              <para>In <xref linkend="sd1InterestCalculator"/> we will present
-              a more elaborate solution based on loops and class
-              methods.</para>
+              <para>In <xref linkend="sd1InterestCalculator"/> we will present a more elaborate solution based on loops and class methods.</para>
             </answer>
           </qandaentry>
         </qandadiv>
@@ -3204,8 +3045,7 @@ Capital after three years:233.31175902999993</screen>
               <programlisting language="java">byte a = 127;
 System.out.println("value=" + a);
 a++;
-System.out.println("New value=" + a);
-</programlisting>
+System.out.println("New value=" + a);</programlisting>
 
               <para>This will produce the following output:</para>
 
@@ -3214,8 +3054,7 @@ New value=-128</screen>
 
               <para>Explain this strange behaviour.</para>
 
-              <para>Moreover you'll find the following code snippet yields a
-              compile time error:</para>
+              <para>Moreover you'll find the following code snippet yields a compile time error:</para>
 
               <programlisting language="java">byte a = 127;
 System.out.println("value=" + a);
@@ -3225,20 +3064,14 @@ System.out.println("New value=" + a);</programlisting>
               <para>Explain this error's cause.</para>
 
               <tip>
-                <para>You may want to read the <link
-                xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc1_html_4">overview
-                section</link> on statements.</para>
+                <para>You may want to read the <link xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc1_html_4">overview section</link> on statements.</para>
               </tip>
             </question>
 
             <answer>
-              <para>A byte variable ranges from -128 to +127. Thus
-              incrementing 127 by 1 yields -128 and thus an overflow
-              error.</para>
+              <para>A byte variable ranges from -128 to +127. Thus incrementing 127 by 1 yields -128 and thus an overflow error.</para>
 
-              <para>Since <xref linkend="glo_Java"/> uses <link
-              xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's
-              complement</link> representation we have:</para>
+              <para>Since <xref linkend="glo_Java"/> uses <link xlink:href="https://en.wikipedia.org/wiki/Two's_complement#firstHeading">Two's complement</link> representation we have:</para>
 
               <informaltable border="1">
                 <tr>
@@ -3260,25 +3093,18 @@ System.out.println("New value=" + a);</programlisting>
                 </tr>
               </informaltable>
 
-              <para>On machine level the above calculation is just an ordinary
-              addition.</para>
+              <para>On machine level the above calculation is just an ordinary addition.</para>
 
-              <para>Conclusion: Watch out when doing (integer)
-              arithmetic!</para>
+              <para>Conclusion: Watch out when doing (integer) arithmetic!</para>
 
-              <para>The compile time error is due to the definition of the
-              <quote>+</quote> operator in Java always returning an
-              <code>int</code> rather than a byte. Consider:</para>
+              <para>The compile time error is due to the definition of the <quote>+</quote> operator in Java always returning an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> rather than a byte. Consider:</para>
 
               <programlisting language="java">    byte a = 120, b = 10;
     System.out.println(a + b);</programlisting>
 
-              <para>This yields the expected output of 130 and corresponds to
-              an <code>int</code> value.</para>
+              <para>This yields the expected output of 130 and corresponds to an <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-C">int</code> value.</para>
 
-              <para>If the expression <code>a + b</code> was of data type
-              <code>byte</code> an arithmetic overflow as in the subsequent
-              code example would occur:</para>
+              <para>If the expression <code>a + b</code> was of data type <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.1-100-A">byte</code> an arithmetic overflow as in the subsequent code example would occur:</para>
 
               <programlisting language="java">    byte a = 120, b = 10;
     
@@ -3286,18 +3112,11 @@ System.out.println("New value=" + a);</programlisting>
     
     System.out.println(sum);</programlisting>
 
-              <para>The explicit type conversion (a so called type cast or
-              cast for short) forces the 4-byte integer into a one-byte
-              variable <code>sum</code> thereby loosing the original value and
-              returning -126 instead.</para>
+              <para>The explicit type conversion (a so called type cast or cast for short) forces the 4-byte integer into a one-byte variable <code>sum</code> thereby loosing the original value and returning -126 instead.</para>
             </answer>
           </qandaentry>
         </qandadiv>
       </qandaset>
-
-      <section xml:id="sw1SectAssignArithmetics">
-        <title>Assignments and simple arithmetics</title>
-      </section>
     </section>
 
     <section xml:id="sw1StringLiterals">
@@ -3318,10 +3137,11 @@ System.out.println("New value=" + a);</programlisting>
 
    }</programlisting>
 
-              <para>Complete the above snippet to produce the following
-              output:</para>
+              <para>Complete the above snippet by adding code to produce the following output:</para>
 
               <screen>3 Games having 22 players each results in 66 players altogether.</screen>
+
+              <para>Write your code in a way that changing i.e. <code>final int games = 4</code> will result in a corresponding change of output.</para>
             </question>
 
             <answer>
@@ -3350,17 +3170,10 @@ System.out.println("New value=" + a);</programlisting>
    System.out.println("Some 'special' words.");
 }</programlisting>
 
-              <para>The corresponding output will be <computeroutput>Some
-              'special' words.</computeroutput>. Change the above code to
-              replace the single quotes by double quotes producing the output
-              <computeroutput>Some "special" words.</computeroutput>
-              instead.</para>
+              <para>The corresponding output will be <computeroutput>Some 'special' words.</computeroutput>. Change the above code to replace the single quotes by double quotes producing the output <computeroutput>Some "special" words.</computeroutput> instead.</para>
 
               <tip>
-                <para>Hunt for <quote>java escape double quote</quote> and
-                read about <link
-                xlink:href="https://proquest.safaribooksonline.com/book/programming/java/9780992133047/chapter-2-language-fundamentals/toc6_html_2#readertoolbar2">character
-                literals</link>.</para>
+                <para>Hunt for <quote>java escape double quote</quote> and read about <link xlink:href="https://proquest.safaribooksonline.com/book/programming/java/9780992133047/chapter-2-language-fundamentals/toc6_html_2#readertoolbar2">character literals</link>.</para>
               </tip>
             </question>
 
@@ -3372,8 +3185,7 @@ System.out.println("New value=" + a);</programlisting>
                   <glossterm>Perfectly obvious</glossterm>
 
                   <glossdef>
-                    <para>Inside a string literal the string terminating
-                    character (") may be escaped using backslashes:</para>
+                    <para>Inside a string literal the string terminating character (") may be escaped using backslashes:</para>
 
                     <programlisting language="java">System.out.println("Some \"special\" words.");</programlisting>
                   </glossdef>
@@ -3383,8 +3195,7 @@ System.out.println("New value=" + a);</programlisting>
                   <glossterm>Even more clumsy</glossterm>
 
                   <glossdef>
-                    <para>Double quotes may be also represented by their char
-                    (not string!) literal:</para>
+                    <para>Double quotes may be also represented by their char (not string!) literal:</para>
 
                     <programlisting language="java">System.out.println("Some " + '"' + "special" + '"' + " words.");</programlisting>
                   </glossdef>
@@ -3401,23 +3212,19 @@ System.out.println("New value=" + a);</programlisting>
         <qandadiv>
           <qandaentry>
             <question>
-              <para xml:id="sw1QandaStringCodingBatExtra">Solve the following
-              external exercises:</para>
+              <para xml:id="sw1QandaStringCodingBatExtra">Solve the following external exercises:</para>
 
               <itemizedlist>
                 <listitem>
-                  <para
-                  xlink:href="http://codingbat.com/prob/p171896">helloName</para>
+                  <para xlink:href="http://codingbat.com/prob/p171896">helloName</para>
                 </listitem>
 
                 <listitem>
-                  <para
-                  xlink:href="http://codingbat.com/prob/p161056">makeAbba</para>
+                  <para xlink:href="http://codingbat.com/prob/p161056">makeAbba</para>
                 </listitem>
 
                 <listitem>
-                  <para
-                  xlink:href="http://codingbat.com/prob/p147483">makeTags</para>
+                  <para xlink:href="http://codingbat.com/prob/p147483">makeTags</para>
                 </listitem>
               </itemizedlist>
             </question>
@@ -3427,17 +3234,15 @@ System.out.println("New value=" + a);</programlisting>
     </section>
 
     <section xml:id="sw1LanguageFundamentalUsingFinal">
-      <title>Using <code>final</code></title>
+      <title>Using <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.12.4">final</code></title>
 
       <qandaset defaultlabel="qanda" xml:id="sw1QandaCircleAreaFinal">
-        <title>Calculating the area of a circle avoiding accidental
-        redefinition</title>
+        <title>Calculating the area of a circle avoiding accidental redefinition</title>
 
         <qandadiv>
           <qandaentry>
             <question>
-              <para>In Exercise <xref linkend="sw1QandaCircleArea"/> you
-              calculated a given circle's area:</para>
+              <para>In Exercise <xref linkend="sw1QandaCircleArea"/> you calculated a given circle's area:</para>
 
               <programlisting language="java">   public static void main(String[] args) {
       
@@ -3449,9 +3254,7 @@ System.out.println("New value=" + a);</programlisting>
       System.out.println(area);
    }</programlisting>
 
-              <para>Though there is nothing wrong with this approach it
-              actually is error prone: A careless programmer may accidentally
-              redefine the value of <code>pi</code>:</para>
+              <para>Though there is nothing wrong with this approach it actually is error prone: A careless programmer may accidentally redefine the value of <code>pi</code>:</para>
 
               <programlisting language="java">   public static void main(String[] args) {
       
@@ -3471,20 +3274,15 @@ System.out.println("New value=" + a);</programlisting>
       System.out.println(area);
    }</programlisting>
 
-              <para>Modify the original code to avoid this type of
-              error.</para>
+              <para>Modify the original code to avoid this type of error.</para>
 
               <tip>
-                <para>You may want to read the <quote
-                xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc5_html_2">Constants</quote>
-                section of <xref linkend="bib_Kurniawan2015"/>.</para>
+                <para>You may want to read the <quote xlink:href="https://proquest.safaribooksonline.com/9780992133047/toc5_html_2">Constants</quote> section of <xref linkend="bib_Kurniawan2015"/>.</para>
               </tip>
             </question>
 
             <answer>
-              <para>The solution is straightforward. We add the
-              <code>final</code> modifier to the definition of our variable
-              <code>pi</code>:</para>
+              <para>The solution is straightforward. We add the <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.12.4">final</code> modifier to the definition of our variable <code>pi</code>:</para>
 
               <programlisting language="java" linenumbering="numbered">public static void main(String[] args) {
       
@@ -3504,20 +3302,13 @@ System.out.println("New value=" + a);</programlisting>
       System.out.println(area);
 }</programlisting>
 
-              <para>Now our flawed assignment at line 9 will be flagged as a
-              compile time error:</para>
+              <para>Now our flawed assignment at line 9 will be flagged as a compile time error:</para>
 
-              <para><computeroutput>The final local variable pi cannot be
-              assigned. It must be blank and not using a compound
-              assignment</computeroutput></para>
+              <para><computeroutput>The final local variable pi cannot be assigned. It must be blank and not using a compound assignment</computeroutput></para>
 
-              <para>Note the second <code>final</code> modification in the
-              definition of our variable <code>area</code> to avoid erroneous
-              redefinitions as well.</para>
+              <para>Note the second <code  xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.12.4">final</code> modification in the definition of our variable <code>area</code> to avoid erroneous redefinitions as well.</para>
 
-              <para>As a rule of thumb: Whenever you intend a variable not to
-              change after an initial assignment use <code>final</code>
-              declaring it to remain constant.</para>
+              <para>As a rule of thumb: Whenever you intend a variable not to change after an initial assignment use <code xlink:href="https://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.12.4">final</code> declaring it to remain constant.</para>
             </answer>
           </qandaentry>
         </qandadiv>
@@ -3543,14 +3334,11 @@ System.out.println("New value=" + a);</programlisting>
       
    }</programlisting>
 
-              <para>This will run smoothly producing the expected
-              output:</para>
+              <para>This will run smoothly producing the expected output:</para>
 
               <screen>20 + 3 + 9 = 32</screen>
 
-              <para>We now prettify our variable definitions by introducing
-              right aligning numbers thereby padding leading positions with
-              zeros:</para>
+              <para>We now prettify our variable definitions by introducing right aligning numbers thereby padding leading positions with zeros:</para>
 
               <programlisting language="java">   public static void main(String[] args) {
 
@@ -3561,24 +3349,17 @@ System.out.println("New value=" + a);</programlisting>
       System.out.println(a + " + " + b + " + " + c + " = " + (a + b + c));
    }</programlisting>
 
-              <para>The above code does not compile due to the compiler error
-              when defining variable <code>c</code>.</para>
+              <para>The above code does not compile due to the compiler error when defining variable <code>c</code>.</para>
 
-              <para>Explain the underlying cause of this error message. Why is
-              <code>b = 03</code> just fine in contrast to <code>c = 09</code>
-              ?</para>
+              <para>Explain the underlying cause of this error message. Why is <code>b = 03</code> just fine in contrast to <code>c = 09</code> ?</para>
 
               <tip>
-                <para>Re-read the section on integer literal
-                representations.</para>
+                <para>Re-read the section on integer literal representations.</para>
               </tip>
             </question>
 
             <answer>
-              <para>Integer literals starting with <quote>0</quote> are being
-              interpreted as octal representation. Since the octal system's
-              set of digits is {0,1,2,3,4,5,6,7} the value <quote>09</quote>
-              is simply not valid.</para>
+              <para>Integer literals starting with <quote>0</quote> are being interpreted as octal representation. Since the octal system's set of digits is {0,1,2,3,4,5,6,7} the value <quote>09</quote> is simply not valid.</para>
             </answer>
           </qandaentry>
         </qandadiv>
@@ -3598,19 +3379,13 @@ System.out.println("New value=" + a);</programlisting>
       System.out.println("Value = " + a);
    }</programlisting>
 
-              <para>On execution we receive the output <code>Value =
-              33</code>. Explain this result</para>
+              <para>On execution we receive the output <code>Value = 33</code>. Explain this result</para>
             </question>
 
             <answer>
-              <para>This problem is related to the previous exercise: The
-              integer literal 041 defines octal representation. Changing from
-              octal to decimal representation takes us to 4 * 8 + 1 =
-              33.</para>
-
-              <para>There are 11 types of people: Those, who know can read
-              binary codes, those who know what binary is and those who don't
-              have a clue what binary is.</para>
+              <para>This problem is related to the previous exercise: The integer literal 041 defines octal representation. Changing from octal to decimal representation takes us to 4 * 8 + 1 = 33.</para>
+
+              <para>There are 11 types of people: Those, who know can read binary codes, those who know what binary is and those who don't have a clue what binary is.</para>
             </answer>
           </qandaentry>
         </qandadiv>