After a few hours of playing with the Oracle JDK 1.6, I was able to make it work without any code change. The magic is done by Bouncy Castle to handle SSL and allow JDK 1.6 to run with TLSv1.2 by ...

Java should also not need a module, it's just a binary that is smart enough to load the appropriate system libraries by itself so it should be enough to just set java=/path/to/java in your argument ...