diff --git a/Klausuren/Sd1/2023summer/Solve/Docs/exam.xml b/Klausuren/Sd1/2023summer/Solve/Docs/exam.xml
index f8e04de04c3961cd2b63e05b6ded01442f30014d..0c65c70cadd11579eb10811bca9beeaf0830c1ab 100644
--- a/Klausuren/Sd1/2023summer/Solve/Docs/exam.xml
+++ b/Klausuren/Sd1/2023summer/Solve/Docs/exam.xml
@@ -193,12 +193,12 @@ int a = ...;
 ...
 try {
     String  s = (String) o;           // May throw a <link
-                xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/ClassCastException.html">ClassCastException</link>
+                xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/ClassCastException.html">ClassCastException</link>
     int c = 4 / a;                    // May throw an <link
-                xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/ArithmeticException.html">ArithmeticException</link>
-} catch (<link xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/ClassCastException.html">ClassCastException</link> e) {
+                xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/ArithmeticException.html">ArithmeticException</link>
+} catch (<link xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/ClassCastException.html">ClassCastException</link> e) {
     System.err.println(e.getMessage());
-} catch (<link xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/ArithmeticException.html">ArithmeticException</link> e) {
+} catch (<link xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/ArithmeticException.html">ArithmeticException</link> e) {
     System.err.println(e.getMessage());
 }</programlisting>
 
@@ -225,14 +225,14 @@ try {
 
           <answer>
             <para>Both <link
-            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/ClassCastException.html">ClassCastException</link>
+            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/ClassCastException.html">ClassCastException</link>
             and <link
-            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/ArithmeticException.html">ArithmeticException</link>
+            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/ArithmeticException.html">ArithmeticException</link>
             are being derived from their common parent <link
-            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/RuntimeException.html">RuntimeException</link>.
+            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/RuntimeException.html">RuntimeException</link>.
             All three classes share the common <link
-            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/Throwable.html">Throwable</link>#<link
-            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/Throwable.html#getMessage()">getMessage()</link>
+            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/Throwable.html">Throwable</link>#<link
+            xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/Throwable.html#getMessage()">getMessage()</link>
             method by inheritance without redefining it.</para>
 
             <para>Our two <code>catch</code> clauses may thus be combined into
@@ -241,10 +241,10 @@ try {
             <programlisting language="java">...
 try {
     String  s = (String) o;         // May throw a <link
-                xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/ClassCastException.html">ClassCastException</link>
+                xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/ClassCastException.html">ClassCastException</link>
     int c = 4 / a;                  // May throw an <link
-                xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/ArithmeticException.html">ArithmeticException</link>
-} catch (<link xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-17-doc/api/java.base/java/lang/RuntimeException.html">RuntimeException</link> e) {      // Common parent class
+                xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/ArithmeticException.html">ArithmeticException</link>
+} catch (<link xlink:href="https://freedocs.mi.hdm-stuttgart.de/doc/openjdk-21-doc/api/java.base/java/lang/RuntimeException.html">RuntimeException</link> e) {      // Common parent class
     System.err.println(e.getMessage());
 }</programlisting>
           </answer>