From da95b9b9182cd8d28e41b4e5650a53c385e9ef6f Mon Sep 17 00:00:00 2001
From: Martin Goik <goik@hdm-stuttgart.de>
Date: Sat, 14 Oct 2017 13:43:26 +0200
Subject: [PATCH] Float exercises, inline emphasis, int literals
---
Doc/Sd1/Ref/LangFundament/javaCoolSmiley.png | Bin 0 -> 11254 bytes
Doc/Sd1/languageFundamentals.xml | 650 +++++++++++++++---
.../CustomLayer/webhelp/positioning.css.patch | 13 +-
ws/Xmlmind/Patch/010_docbookCss.patch | 16 +
4 files changed, 579 insertions(+), 100 deletions(-)
create mode 100644 Doc/Sd1/Ref/LangFundament/javaCoolSmiley.png
diff --git a/Doc/Sd1/Ref/LangFundament/javaCoolSmiley.png b/Doc/Sd1/Ref/LangFundament/javaCoolSmiley.png
new file mode 100644
index 0000000000000000000000000000000000000000..6ca699f3d882c4b4330318addb7738df9fb24811
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literal 0
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diff --git a/Doc/Sd1/languageFundamentals.xml b/Doc/Sd1/languageFundamentals.xml
index 1e9038355..fb97ae3bd 100644
--- a/Doc/Sd1/languageFundamentals.xml
+++ b/Doc/Sd1/languageFundamentals.xml
@@ -425,19 +425,34 @@ pi = 1.0; // Compile time error: Constant cannot be modified</programlisting>
</figure>
<figure xml:id="sd1_fig_legalVariableName">
- <title>Variable names</title>
-
- <para>A variable</para>
+ <title>Variable names (identifier)</title>
<informaltable border="1">
+ <colgroup width="73%"/>
+
+ <colgroup width="15%"/>
+
+ <colgroup width="12%"/>
+
+ <tr>
+ <th>Rules</th>
+
+ <th>Legal</th>
+
+ <th>Illegal</th>
+ </tr>
+
<tr>
<td><itemizedlist>
<listitem>
- <para>Starts with a letter</para>
+ <para>Start with a letter, <quote><code>_</code></quote> or
+ <quote><code>$</code></quote></para>
</listitem>
<listitem>
- <para>May be followed by letters or digits</para>
+ <para><emphasis role="bold">May</emphasis> be followed by
+ letters, digits, <quote><code>_</code></quote> or
+ <quote><code>$</code></quote></para>
</listitem>
<listitem>
@@ -445,65 +460,69 @@ pi = 1.0; // Compile time error: Constant cannot be modified</programlisting>
<itemizedlist>
<listitem>
- <para>a <xref linkend="glo_Java"/> keyword</para>
- </listitem>
-
- <listitem>
- <para>a boolean literal</para>
+ <para>a <xref linkend="glo_Java"/> <link
+ linkend="sd1_fig_javaKeywords">keyword</link></para>
</listitem>
<listitem>
- <para>The <code>null</code> literal</para>
+ <para><quote><code>boolean</code></quote> or
+ <quote><code>null</code></quote> literal</para>
</listitem>
</itemizedlist>
</listitem>
</itemizedlist></td>
- <td><glosslist>
- <glossentry>
- <glossterm>Legal</glossterm>
+ <td valign="top"><itemizedlist>
+ <listitem>
+ <para><code>$test</code></para>
+ </listitem>
- <glossdef>
- <itemizedlist>
- <listitem>
- <para>$test</para>
- </listitem>
-
- <listitem>
- <para>count</para>
- </listitem>
-
- <listitem>
- <para>blue</para>
- </listitem>
- </itemizedlist>
- </glossdef>
- </glossentry>
+ <listitem>
+ <para><code>_</code></para>
+ </listitem>
- <glossentry>
- <glossterm>Illegal</glossterm>
+ <listitem>
+ <para><code>count</code></para>
+ </listitem>
- <glossdef>
- <itemizedlist>
- <listitem>
- <para>2sad</para>
- </listitem>
-
- <listitem>
- <para>switch</para>
- </listitem>
-
- <listitem>
- <para>true</para>
- </listitem>
- </itemizedlist>
- </glossdef>
- </glossentry>
- </glosslist></td>
+ <listitem>
+ <para><code>blue</code></para>
+ </listitem>
+ </itemizedlist></td>
+
+ <td valign="top"><itemizedlist>
+ <listitem>
+ <para><code><emphasis role="red">2sad</emphasis></code></para>
+ </listitem>
+
+ <listitem>
+ <para><code><emphasis
+ role="red">switch</emphasis></code></para>
+ </listitem>
+
+ <listitem>
+ <para><code><emphasis role="red">true</emphasis></code></para>
+ </listitem>
+ </itemizedlist></td>
</tr>
</informaltable>
</figure>
+ <figure xml:id="sd1_fig_javaKeywords">
+ <title><xref linkend="glo_Java"/> keywords.</title>
+
+ <programlisting language="java">abstract continue for new switch
+assert default if package synchronized
+boolean do goto private this
+break double implements protected throw
+byte else import public throws
+case enum instanceof return transient
+catch extends int short try
+char final interface static void
+class finally long strictfp volatile
+const float native super while</programlisting>
+ </figure>
+
<figure xml:id="sd1_fig_varCaseSensitive">
<title>Case sensitivity</title>
@@ -511,7 +530,11 @@ pi = 1.0; // Compile time error: Constant cannot be modified</programlisting>
<programlisting language="java">int count = 32;
int Count = 44;
-System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
+System.out.println(count + ":" + Count);</programlisting>
+
+ <para>Resulting output:</para>
+
+ <screen>32:44</screen>
</figure>
<qandaset defaultlabel="qanda" xml:id="sw1QandaLegalVarNames">
@@ -800,7 +823,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
</qandaset>
<figure xml:id="sd1_fig_varDeclareBeforeUse">
- <title>Declare before use</title>
+ <title>Define before use</title>
<glosslist>
<glossentry>
@@ -808,7 +831,7 @@ System.out.println(count + ":" + Count); // This yields "32:44"</programlisting>
<glossdef>
<programlisting language="java">double f;
-f = -4.55;</programlisting>
+f = -4.55; </programlisting>
</glossdef>
</glossentry>
@@ -816,7 +839,7 @@ f = -4.55;</programlisting>
<glossterm>Wrong</glossterm>
<glossdef>
- <programlisting language="java">f = -4.55;
+ <programlisting language="java">f = -4.55;
double f;</programlisting>
</glossdef>
</glossentry>
@@ -921,6 +944,10 @@ void main(void) {
<glossdef>
<para>~$500 million.</para>
+
+ <para><link
+ xlink:href="https://www.youtube.com/watch?v=gp_D8r-2hwk">related
+ video</link></para>
</glossdef>
</glossentry>
</glosslist></td>
@@ -939,7 +966,7 @@ void main(void) {
converted to a 16 bit signed integer.</para>
<para>The number was larger than 32,767, the largest integer possible in
- a 16 bit signed integer, <emphasis role="bold">and thus the conversion
+ a 16 bit signed integer, <emphasis role="red">and thus the conversion
failed</emphasis>.</para>
</figure>
@@ -1301,7 +1328,7 @@ int i = (int) d; // Explicit cast double to int</programlisting>
<screen>-1 111
-2 +110
-- ------
--3 1_101 (See comment below)</screen>
+-3 <emphasis role="red">1_</emphasis>101 (See comment below)</screen>
<para>In 3-bit two complement representation the
leftmost bit will be discarded. Thus the actual result
@@ -1595,9 +1622,9 @@ pi = -4; // Compile time error:
<glossterm>Even better</glossterm>
<glossdef>
- <para><programlisting language="java">final double PI = 3.141592653589793; // Coding style (Best practices):
- // Using capital letters for constant variable
-...</programlisting></para>
+ <para><programlisting language="java">final double PI = 3.141592653589793; // Coding style (Best practices):
+ // Using capital letters for
+... // constant variable.</programlisting></para>
</glossdef>
</glossentry>
</glosslist>
@@ -1613,8 +1640,9 @@ pi = -4; // Compile time error:
<glossdef>
<programlisting language="java">int a = -15;</programlisting>
- <para>Possible types: All eight primitive <xref
- linkend="glo_Java"/> types.</para>
+ <para>Possible types: All eight <link
+ xlink:href="https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html">primitive</link>
+ <xref linkend="glo_Java"/> types.</para>
</glossdef>
</glossentry>
@@ -1624,7 +1652,7 @@ pi = -4; // Compile time error:
<glossdef>
<programlisting language="java">GpsPosition start = new GpsPosition(48.7758, 9.1829);</programlisting>
- <para>Possible types: Arbitrary built in or user defined
+ <para>Possible types: Arbitrary built-in or user defined
classes.</para>
</glossdef>
</glossentry>
@@ -1632,7 +1660,7 @@ pi = -4; // Compile time error:
</figure>
<figure xml:id="sd1_fig_refTypeVariants">
- <title>Reference type variants</title>
+ <title>Reference type examples</title>
<programlisting language="java">GpsPosition start = new GpsPosition(48.7758, 9.1829);
String name = "Simon";
@@ -1669,19 +1697,19 @@ LocalDate birtday = LocalDate.of(1990, Month.JULY, 5);</programlisting>
<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("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
+Binary 35
Hex 35
Octal 35</screen></td>
</tr>
</informaltable>
</figure>
- <qandaset defaultlabel="qanda" xml:id="sw1QandaWild">
+ <qandaset defaultlabel="qanda" xml:id="sd1_qanda_illegalOctalLiteral">
<title>Pretty may not be pretty</title>
<qandadiv>
@@ -1689,13 +1717,13 @@ Octal 35</screen></td>
<question>
<para>Consider the following program:</para>
- <programlisting language="java"> public static void main(String[] args) {
+ <programlisting language="java">public static void main(String[] args) {
- int a = 20,
- b = 3,
- c = 9;
+int a = 20,
+ b = 3,
+ c = 9;
- System.out.println(a + " + " + b + " + " + c + " = " + (a + b + c));
+ System.out.println(a + " + " + b + " + " + c + " = " + (a + b + c));
}</programlisting>
@@ -1716,8 +1744,8 @@ Octal 35</screen></td>
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 a compiler error when
+ defining variable <code>c</code>.</para>
<para>Explain the underlying cause. In particular: Why is <code>b
= 03</code> just fine in contrast to <code>c = 09</code> ?</para>
@@ -1729,10 +1757,9 @@ Octal 35</screen></td>
</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> denote 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 invalid.</para>
</answer>
</qandaentry>
</qandadiv>
@@ -1756,11 +1783,104 @@ System.out.println("Value = " + a);</programlisting>
<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>
+ octal to decimal representation yields 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>
+ have a clue about binary at all.</para>
+ </answer>
+ </qandaentry>
+ </qandadiv>
+ </qandaset>
+
+ <qandaset defaultlabel="qanda" xml:id="sd1_qanda_abesntEmoticon">
+ <title>Representing emoticons.</title>
+
+ <qandadiv>
+ <qandaentry>
+ <question>
+ <para>We may use the <link
+ xlink:href="https://www.fileformat.info/info/unicode/char/27bd/index.htm">HEAVY
+ WEDGE-TAILED RIGHTWARDS ARROW</link> character in <xref
+ linkend="glo_Java"/>:</para>
+
+ <programlisting language="java">System.out.println("Arrow: " + "➽");</programlisting>
+
+ <para>This results in:</para>
+
+ <screen>Arrow: ➽</screen>
+
+ <para>Strangely the <link
+ xlink:href="https://www.fileformat.info/info/unicode/char/1f60e/index.htm">SMILING
+ FACE WITH SUNGLASSES' (U+1F60E)</link> emoticon appears to be
+ different. Answer the following questions:</para>
+
+ <orderedlist>
+ <listitem>
+ <para>Why can't the emoticon be used accordingly?</para>
+
+ <tip>
+ <para>Try to assign the corresponding int values like e.g.
+ <code>0x27BD</code> rather than using the symbol
+ itself.</para>
+ </tip>
+ </listitem>
+
+ <listitem>
+ <para>How do we represent it in <xref
+ linkend="glo_Java"/>?</para>
+ </listitem>
+ </orderedlist>
+ </question>
+
+ <answer>
+ <orderedlist>
+ <listitem>
+ <para>Our emoticon's decimal <xref linkend="glo_unicode"/>
+ value is 128,526 or hexadecimal <code>1f60E</code> . So its
+ value is larger than 65535 and thus requires more than two
+ bytes. <xref linkend="glo_Java"/> however represents
+ characters using just two bytes. Thus the emoticon does not
+ fit into a single <xref linkend="glo_Java"/> <code>char</code>
+ value:</para>
+
+ <programlisting language="java">char c = 0x1f60e; // Error: Incompatible types
+ // Required: char Found: int</programlisting>
+
+ <para>On contrary the arrow's decimal value of 10173 or
+ hexadecimal <code>0x27BD</code> fits perfectly well into a
+ <xref linkend="glo_Java"/> <code>char</code> variable:</para>
+
+ <programlisting language="java">char c = 0x27BD;
+System.out.println("Arrow: " + c);
+System.out.println("Arrow value: " + (int)c);</programlisting>
+
+ <para>Result:</para>
+
+ <screen>Arrow: ➽
+Arrow value: 10173</screen>
+ </listitem>
+
+ <listitem>
+ <para>We may represent two two-byte codes in sequence:</para>
+
+ <programlisting language="java">System.out.println("Cool smiley: " + "\uD83D\uDE0E");</programlisting>
+
+ <para>Resulting in:</para>
+
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="Ref/LangFundament/javaCoolSmiley.png"/>
+ </imageobject>
+ </mediaobject>
+
+ <para>We may also convert the <xref linkend="glo_unicode"/>
+ value directly:</para>
+
+ <programlisting language="java">System.out.println(Character.<methodname
+ xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Character.html#toChars-int-">toChars(0x1f60e)</methodname>);</programlisting>
+ </listitem>
+ </orderedlist>
</answer>
</qandaentry>
</qandadiv>
@@ -1770,14 +1890,279 @@ System.out.println("Value = " + a);</programlisting>
<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>
+ role="red">L</emphasis>); // o.K.
+System.out.println(10000000000 ); // Compile time error: Integer number larger
+ // than 2147483647 (2^31 - 1, Integer.<link
+ xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html#MAX_VALUE">MAX_VALUE</link>)
+ </programlisting>
+ </figure>
+
+ <figure xml:id="sd1_fig_literals">
+ <title>Literal examples</title>
+
+ <programlisting language="java">System.out.println("Hello"); // A String literal
+
+System.out.println(33452); // An int literal
+
+System.out.println(34.0223); // An double (floating point) literal</programlisting>
+ </figure>
+
+ <figure xml:id="sd1_fig_integerLiteral">
+ <title><code>int</code> literals</title>
+
+ <programlisting language="java">System.out.println("Value 1: " + 29);
+System.out.println("Value 2: " + 0b11101);
+System.out.println("Value 3: " + 0x1D);
+System.out.println("Value 4: " + 035);</programlisting>
+
+ <screen>Value 1: 29
+Value 2: 29
+Value 3: 29
+Value 4: 29</screen>
+ </figure>
+
+ <figure xml:id="sd1_fig_integerLiteralExplain">
+ <title><code>int</code> literals explained</title>
+
+ <informaltable border="1">
+ <colgroup width="11%"/>
+
+ <colgroup width="13%"/>
+
+ <colgroup width="11%"/>
+
+ <colgroup width="65%"/>
+
+ <tr>
+ <th>Literal</th>
+
+ <th>Discriminator</th>
+
+ <th>Type</th>
+
+ <th>Value</th>
+ </tr>
+
+ <tr>
+ <td valign="top">29</td>
+
+ <td valign="top"><para>Default:</para><para>base <emphasis
+ role="red">10</emphasis></para></td>
+
+ <td valign="top">Decimal</td>
+
+ <td valign="top"><inlineequation>
+ <m:math display="inline">
+ <m:mrow>
+ <m:mrow>
+ <m:mn>2</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">10</m:mn>
+
+ <m:mn>1</m:mn>
+ </m:msup>
+ </m:mrow>
+
+ <m:mo>+</m:mo>
+
+ <m:mrow>
+ <m:mn>9</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">10</m:mn>
+
+ <m:mn>0</m:mn>
+ </m:msup>
+ </m:mrow>
+ </m:mrow>
+ </m:math>
+ </inlineequation></td>
+ </tr>
+
+ <tr>
+ <td valign="top"><emphasis role="red">0b</emphasis>11101</td>
+
+ <td valign="top"><emphasis role="red">0b</emphasis>, base <emphasis
+ role="red">2</emphasis></td>
+
+ <td valign="top">Binary</td>
+
+ <td valign="top"><para><inlineequation>
+ <m:math display="inline">
+ <m:mrow>
+ <m:mrow>
+ <m:mn>1</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">2</m:mn>
+
+ <m:mn>4</m:mn>
+ </m:msup>
+ </m:mrow>
+
+ <m:mo>+</m:mo>
+
+ <m:mrow>
+ <m:mn>1</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">2</m:mn>
+
+ <m:mn>3</m:mn>
+ </m:msup>
+ </m:mrow>
+
+ <m:mo>+</m:mo>
+
+ <m:mrow>
+ <m:mn>1</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">2</m:mn>
+
+ <m:mn>2</m:mn>
+ </m:msup>
+ </m:mrow>
+ </m:mrow>
+ </m:math>
+ </inlineequation></para><para><inlineequation>
+ <m:math display="inline">
+ <m:mrow>
+ <m:mo>+</m:mo>
+
+ <m:mrow>
+ <m:mn>0</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">2</m:mn>
+
+ <m:mn>1</m:mn>
+ </m:msup>
+ </m:mrow>
+
+ <m:mo>+</m:mo>
+
+ <m:mrow>
+ <m:mn>1</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">2</m:mn>
+
+ <m:mn>0</m:mn>
+ </m:msup>
+ </m:mrow>
+ </m:mrow>
+ </m:math>
+ </inlineequation></para></td>
+ </tr>
+
+ <tr>
+ <td><emphasis role="red">0x</emphasis>1D</td>
+
+ <td><emphasis role="red">0x</emphasis>, base <emphasis
+ role="red">16</emphasis></td>
+
+ <td>Hexadecimal</td>
+
+ <td><inlineequation>
+ <m:math display="inline">
+ <m:mrow>
+ <m:mrow>
+ <m:mn>1</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">16</m:mn>
+
+ <m:mn>1</m:mn>
+ </m:msup>
+ </m:mrow>
+
+ <m:mo>+</m:mo>
+
+ <m:mrow>
+ <m:mn>13</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">10</m:mn>
+
+ <m:mn>0</m:mn>
+ </m:msup>
+ </m:mrow>
+ </m:mrow>
+ </m:math>
+ </inlineequation></td>
+ </tr>
+
+ <tr>
+ <td><emphasis role="red">0</emphasis>35</td>
+
+ <td><emphasis role="red">0</emphasis>, base <emphasis
+ role="red">8</emphasis></td>
+
+ <td>Octal</td>
+
+ <td><inlineequation>
+ <m:math display="inline">
+ <m:mrow>
+ <m:mrow>
+ <m:mn>3</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">8</m:mn>
+
+ <m:mn>1</m:mn>
+ </m:msup>
+ </m:mrow>
+
+ <m:mo>+</m:mo>
+
+ <m:mrow>
+ <m:mn>5</m:mn>
+
+ <m:mo>×</m:mo>
+
+ <m:msup>
+ <m:mn mathcolor="red">8</m:mn>
+
+ <m:mn>0</m:mn>
+ </m:msup>
+ </m:mrow>
+ </m:mrow>
+ </m:math>
+ </inlineequation></td>
+ </tr>
+ </informaltable>
</figure>
<figure xml:id="sd1_fig_javaLiterals">
<title><xref linkend="glo_Java"/> literals</title>
<informaltable border="1">
+ <colgroup width="24%"/>
+
+ <colgroup width="76%"/>
+
<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>,
@@ -1806,16 +2191,21 @@ System.out.println(10000000000 ); // Compile time error: Integer number too lar
<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>
- <td><code>35L</code>, <code>0b10_0011L</code>, <code>0x23L</code>,
- <code>043L</code>, <code>-35L</code>,...</td>
+ <td><code>35<emphasis role="red">L</emphasis></code>,
+ <code>0b10_0011<emphasis role="red">L</emphasis></code>,
+ <code>0x23<emphasis role="red">L</emphasis></code>,
+ <code>043<emphasis role="red">L</emphasis></code>,
+ <code>-35<emphasis role="red">L</emphasis></code>,...</td>
</tr>
<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>
- <td><code>55.43F</code>, <code>1.7E-23F</code>, <code>-17.F,
- 100_342.334_113</code></td>
+ <td><code>55.43<emphasis role="red">F</emphasis></code>,
+ <code>1.7E-23<emphasis role="red">F</emphasis></code>,
+ <code>-17.<emphasis role="red">F</emphasis></code>,
+ <code>100_342.334_113<emphasis role="red">F</emphasis></code></td>
</tr>
<tr>
@@ -1827,7 +2217,8 @@ System.out.println(10000000000 ); // Compile time error: Integer number too lar
</tr>
<tr>
- <td><code>String</code></td>
+ <td><code
+ xlink:href="https://docs.oracle.com/javase/tutorial/java/data/strings.html">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>
@@ -2037,8 +2428,9 @@ System.out.println(intensity);</programlisting>
<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>
+ to 7. So <quote>047</quote> is fine but <quote>048</quote> is
+ <link linkend="sd1_qanda_illegalOctalLiteral">again</link>
+ invalid.</para>
</answer>
</qandaentry>
</qandadiv>
@@ -2649,6 +3041,8 @@ System.out.println("Character: " + arabicChar);</programlisting>
System.out.println("Olympic winter games: " + year);</programlisting>
+ <para>Could this happen?</para>
+
<screen>Olympic winter games: 2014</screen>
</figure>
</section>
@@ -2679,13 +3073,17 @@ System.out.println("Sum = " + sum);</programlisting>
<para>Result:</para>
<informaltable border="1">
+ <colgroup width="27%"/>
+
+ <colgroup width="73%"/>
+
<tr>
<td valign="top"><screen>Sum = -2</screen></td>
<td><screen> 01111111_11111111_11111111_11111111
-+ 01111111_11111111_11111111_11111111
++ 01111111_11111111_11111111_11111111
_____________________________________
-1_11111111_11111111_11111111_11111110</screen></td>
+<emphasis role="red">1_</emphasis>11111111_11111111_11111111_11111110</screen></td>
</tr>
</informaltable>
</figure>
@@ -3900,21 +4298,79 @@ System.out.println(<link
<figure xml:id="sd1_fig_summingOverflowDetect">
<title>Detecting arithmetic overflow (Java 8+)</title>
- <informaltable border="1">
- <tr>
- <td valign="top"><programlisting language="java">try {
+ <programlisting language="java">try {
int sum = Math.<link
- xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#addExact-int-int-">addExact(2147480000, 2147480000)</link>;
+ xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#addExact-int-int-">addExact(2147480000, 2147480000)</link>;
System.out.println("sum = " + sum);
-} catch (<link xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/ArithmeticException.html">ArithmeticException</link> ex) {
- System.err.println("Problem:" + ex.getMessage());
-}</programlisting></td>
+} catch (<link
+ xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/ArithmeticException.html">ArithmeticException</link> ex) {
+ System.err.println("Problem:" + ex.getMessage());
+}</programlisting>
+
+ <screen>Problem:integer overflow</screen>
+ </figure>
+
+ <figure xml:id="sd1_fig_divideByZero">
+ <title>Dividing by zero</title>
+
+ <informaltable border="1">
+ <tr>
+ <td valign="top"><programlisting language="java">double f = 34.3 / 0;
+System.out.println("Value: " + f);</programlisting></td>
- <td valign="top"><screen>Problem:integer overflow</screen></td>
+ <td valign="top"><screen>Value: Infinity</screen></td>
</tr>
</informaltable>
</figure>
+ <qandaset defaultlabel="qanda" xml:id="sd1_qanda_infinityCalculations">
+ <title>Expressions involving infinity</title>
+
+ <qandadiv>
+ <qandaentry>
+ <question>
+ <para><xref linkend="sd1_fig_divideByZero"/> raises some
+ interesting questions:</para>
+
+ <orderedlist>
+ <listitem>
+ <para>What happens if we add e.g. 1000 to a variable
+ containing a value of Infinity?</para>
+ </listitem>
+
+ <listitem>
+ <para>What happens if we add or subtract two variables both
+ containing a value of
+ <code><quote>Infinity</quote></code>?</para>
+ </listitem>
+ </orderedlist>
+ </question>
+
+ <answer>
+ <itemizedlist>
+ <listitem>
+ <programlisting language="java">double f = 1. / 0;
+double difference = f - 1000;
+System.out.println("Difference: " + difference);</programlisting>
+
+ <screen>Difference: Infinity</screen>
+ </listitem>
+
+ <listitem>
+ <para><programlisting language="java">double f = 1. / 0;
+double g = 1. / 0;
+double difference = f - g;
+System.out.println("Difference: " + difference);</programlisting><screen>Difference: NaN</screen><parameter>Explanation:
+ This represents a special <quote
+ xlink:href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html#NaN">not
+ a number</quote> encoded value.</parameter></para>
+ </listitem>
+ </itemizedlist>
+ </answer>
+ </qandaentry>
+ </qandadiv>
+ </qandaset>
+
<figure xml:id="sd1_fig_genericBinaryOpType">
<title>Operator type behaviour</title>
diff --git a/ws/Docbook/CustomLayer/webhelp/positioning.css.patch b/ws/Docbook/CustomLayer/webhelp/positioning.css.patch
index d185f946d..748750954 100644
--- a/ws/Docbook/CustomLayer/webhelp/positioning.css.patch
+++ b/ws/Docbook/CustomLayer/webhelp/positioning.css.patch
@@ -1,5 +1,5 @@
---- positioning.css.orig 2017-09-18 10:14:19.575041451 +0200
-+++ positioning.css 2017-09-18 10:13:29.027701744 +0200
+--- positioning.css.orig 2017-10-14 09:40:46.682122317 +0200
++++ positioning.css 2017-10-14 09:39:32.787147200 +0200
@@ -1,3 +1,8 @@
+/*
+ * patched by: /usr/share/hdm-docbook-xsl/CustomLayer/webhelp/positioning.css.patch
@@ -53,7 +53,7 @@
#content .qandaset>table, #content .qandaset>table td, #content .calloutlist table, #content .calloutlist table td, #content .navfooter table, #content .navfooter table td {
border: 0px solid;
}
-@@ -375,3 +394,117 @@
+@@ -375,3 +394,124 @@
}
@@ -171,3 +171,10 @@
+:target {
+ background-color: #ffa;
+}
++
++/* inline emphasis role based extensions */
++.red {
++ color: red;
++ font-weight: bold !important;
++}
++
diff --git a/ws/Xmlmind/Patch/010_docbookCss.patch b/ws/Xmlmind/Patch/010_docbookCss.patch
index b42da3328..be7ccd226 100644
--- a/ws/Xmlmind/Patch/010_docbookCss.patch
+++ b/ws/Xmlmind/Patch/010_docbookCss.patch
@@ -40,3 +40,19 @@
keycombo {
display: inline;
}
+--- /usr/share/xmlmind.orig/addon/config/docbook/css/inline2.imp 2017-06-12 15:37:30.000000000 +0200
++++ /usr/share/xmlmind/addon/config/docbook/css/inline2.imp 2017-10-14 09:58:40.909253180 +0200
+@@ -39,6 +39,13 @@
+ font-style: normal;
+ background-color: #F0F080;
+ }
++/* HdM Extension */
++emphasis[role=red] {
++ color: red;
++ font-weight: bold !important;
++ font-style: normal;
++}
++/* End HdM Extension */
+
+ emphasis > emphasis {
+ font-style: normal;
--
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