Merge pull request #1 from rmraya/Java21

Java21

Author: rmraya

build.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <project basedir="." default="compile" name="XMLJava">
-    <property name="target" value="17" />
-    <property name="source" value="17" />
+    <property name="target" value="21" />
+    <property name="source" value="21" />
     <property name="build.compiler" value="javac10+" />
     <target name="init">
         <mkdir dir="bin" />