Workaround for those experiencing issues with Java programme GUIs

[lux70]

Hello

I had problems with Distrobox and the graphical user interface (GUI) of a Java program.
The GUI window appeared black.
I solved the problem by setting the following variable in the Distrobox container:

export _JAVA_AWT_WM_NONREPARENTING=1

When I launched the program, the problem seemed to have disappeared and it displayed correctly.

This may be useful to others...