ADDITIONAL SYSTEM INFORMATION :
Java info:
openjdk 18.0.1.1 2022-04-22
OpenJDK Runtime Environment (build 18.0.1.1+2)
OpenJDK 64-Bit Server VM (build 18.0.1.1+2, mixed mode

OS: Arch Linux

A DESCRIPTION OF THE PROBLEM :
Currently Java (OpenJDK) put its configuration and other data files inside `$HOME/.java`.

Please follow XDG XDG Base Directory Specification on Linux systems.

Specification: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html

I'm aware of the several environment variables to configure Java like `JAVA_TOOL_OPTIONS`, `JDK_JAVA_OPTIONS`, `_JAVA_OPTIONS`.

I'm also aware of the flag `-Djava.util.prefs.userRoot` which seems to work but only partially: for example, the directory `$HOME/.java/fonts/` is still created even after changing the value of the mentioned flag.

Here's a related bug report: https://bugzilla.redhat.com/show_bug.cgi?id=1154277

Thanks.