j2dbench need constant updating of javac source/target

j2dbench makefile, build.xml and redme have weird likness of old bytecode, and with each LTS, someting like:

{code:java}
diff --git a/src/demo/share/java2d/J2DBench/Makefile b/src/demo/share/java2d/J2DBench/Makefile
index 04b0818a2c3..eacb87d5e26 100644
--- a/src/demo/share/java2d/J2DBench/Makefile
+++ b/src/demo/share/java2d/J2DBench/Makefile
@@ -120,7 +120,7 @@ $(CLASSES):
 mkdirs: $(DIST) $(CLASSES)
 
 $(CLASSES)/j2dbench/%.class: $(SOURCEPATH)/j2dbench/%.java
- javac -g:none -source 1.7 -target 1.7 -d $(CLASSES) -sourcepath $(SOURCEPATH) $<
+ javac -g:none -source 9 -target 9 -d $(CLASSES) -sourcepath $(SOURCEPATH) $<
 
 clean:
        rm -rf $(CLASSES)
diff --git a/src/demo/share/java2d/J2DBench/README b/src/demo/share/java2d/J2DBench/README
index 3b9f25c13f1..af760c1bc97 100644
--- a/src/demo/share/java2d/J2DBench/README
+++ b/src/demo/share/java2d/J2DBench/README
@@ -20,8 +20,8 @@ Minimum requirements
 -----------------------------------------------------------------------
 
 The benchmark requires at least jdk1.4 to compile and run. Note that
-source/target is set to 1.7 in the makefile and build.xml, because of
-support in jdk 14 compiler. To check compatibility with jdk1.4 you can
+source/target is set to 9 in the makefile and build.xml, because of
+support in jdk 22 compiler. To check compatibility with jdk1.4 you can
 use "-source 1.4 -target 1.4" options and jdk1.7.
 
 -----------------------------------------------------------------------
diff --git a/src/demo/share/java2d/J2DBench/build.xml b/src/demo/share/java2d/J2DBench/build.xml
index 7b202946cf1..d2c642e8928 100644
--- a/src/demo/share/java2d/J2DBench/build.xml
+++ b/src/demo/share/java2d/J2DBench/build.xml
@@ -49,7 +49,7 @@
   <target name="compile" depends="init"
         description="compile the source " >
     <!-- Compile the java code from ${src} into ${build} -->
- <javac debug="off" source="1.7" target="1.7" srcdir="${src}" destdir="${build}"/>
+ <javac debug="off" source="9" target="9" srcdir="${src}" destdir="${build}"/>
   </target>
 
   <target name="run" depends="dist">
{code}

is needed.

As the j2dbench is nearly always run against the jdk it is part of, or at elast against jdk it was build with, I would like to suggest the removal of any {{source/target}} occurrences from j2dbench

Currently when compiled by jdk21 there is about 50 warnings based on deprecation. Those should be fixed to.