JAVA_HOME not defined but it is

[ghost]

Verify

• if you cannot compile/install , read https://github.com/lindenb/jvarkit/wiki/Compilation before submitting a new issue
• the version of java JAVA

  Subject of the issue

  Describe your issue here. I downloaded the precompiled jar to use

  Your environment

• version of jvarkit e5a6a839b
• version of java java -version

  
  openjdk version "17.0.7" 2023-04-18
  OpenJDK Runtime Environment (build 17.0.7+7-Ubuntu-0ubuntu122.04.2)
  OpenJDK 64-Bit Server VM (build 17.0.7+7-Ubuntu-0ubuntu122.04.2, mixed mode, sharing)

* the value of `${JAVA_HOME}`

echo $JAVA_HOME /usr/lib/jvm/java-17-openjdk-amd64

* which OS
Ubuntu 22.04.2 LTS
### Steps to reproduce

when I launch a command, I get 

[WARN][OpenJdkCompiler]JAVA_HOME is not defined [WARN][OpenJdkCompiler]JAVA_HOME is not defined WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by htsjdk.samtools.util.CloserUtil (file:/home/alessandro/Documents/MAexperiment/GATK/JVARKIT/jvarkit.jar) to method com.sun.xml.internal.stream.XMLEventReaderImpl.close() WARNING: Please consider reporting this to the maintainers of htsjdk.samtools.util.CloserUtil WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release

However, it completes anyway. I suspect there might be an issue of dependency? Since by default, Ubuntu install Java 11 and you have compiled your jar with Java 17. 

Hope this helps (it's not really an issue for me at the moment because the command worked anyway).

[lindenb]

all these are just warnings. The undefined JAVA_HOME is strange but anyway, the command was completed. The "illegal reflective access operation has occurred" is a minor change in the java API I should change.