[Feature Request] Mount all Java binary files and upgrade JDK version

[BloCamLimb]

1. Compiling a source file will generate multiple class files when the source file contains static nested classes or anonymous classes. We should mount compileDir rather than bin, as -classpath shows.
2. Upgrade to Liberica JDK 20, e.g.

wget https://download.bell-sw.com/java/20+37/bellsoft-jdk20+37-linux-amd64.deb
sudo apt install ./bellsoft-jdk20+37-linux-amd64.deb

see https://docs.bell-sw.com/liberica-jdk/20b37/general/install-guide/