missed java version updates

Author: holgerfriedrich

examples/karaf-graphql-example/karaf-graphql-example-websocket/pom.xml

@@ -70,8 +70,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>11</source>
-                    <target>11</target>
+                    <source>21</source>
+                    <target>21</target>
                 </configuration>
             </plugin>
             <plugin>

specs/javaxml/pom.xml

@@ -32,6 +32,10 @@
     <name>Apache Karaf :: Specs :: Java Xml</name>
 
     <properties>
+        <!-- for now intentionally kept at version 8, because it replaces
+        the modules in javax.xml, originally belonging to the org.w3c.dom
+        package. This is no longer allowed in Java 9 and later.
+        -->
         <javaVersion>8</javaVersion>
         <maven.compiler.release>${javaVersion}</maven.compiler.release>
     </properties>

specs/javaxmlws/pom.xml

@@ -31,7 +31,7 @@
     <name>Apache Karaf :: Specs :: Java Xml WS</name>
 
     <properties>
-        <maven.compiler.target>8</maven.compiler.target>
+        <maven.compiler.target>21</maven.compiler.target>
     </properties>
 
     <dependencyManagement>

specs/locator/pom.xml

@@ -31,7 +31,7 @@
     <name>Apache Karaf :: Specs :: Locator</name>
 
     <properties>
-        <maven.compiler.target>8</maven.compiler.target>
+        <maven.compiler.target>21</maven.compiler.target>
     </properties>
 
 </project>