For some time I have had problems using Java GUI applications with
Fluxbox. One of the problems I experience is that when I add a Java
application to a tab group, I usually no longer able to click on it's
tab to bring it to the foreground. In order to switch to the
application, I have to use Alt+Tab, which gets very cumbersome if
there are many windows in the same workspace. When a Java application
isn't in a tab group, it comes to the foreground just fine with a
mouse-over or click.
I have noticed that on rare occasions, clicking the tab of a java
application does work as expected. It seems there is some kind of
race condition, because it never works consistently.
Examples of Java applications that I use which have this problem:
Bug tracked in Debian as bug #653095