System.exit() didn't kill all the threads it spawned in Linux

Facing problem while doing System.exit(0);
Even though it is happening inconsistently but this how it is-------.
The main application has spawned some threads.
On receiving a particular event it interrupts all the threads and calls system.exit(0).
Each thread after catching interrupted exception sends a interrupt to itself.
What I'm observing is, once in a while the spwned threads are still hanging even though the application has exited.
I'm having
1) java version "1.4.2_04" and
2) Linux 2.4.21-27.EL

After writing Java code for 6 or 7 years, then having a years break and writing C++
and D code. I came back to Java and am having the same problem as you.
The cause of my problem was that I was writing the wrong code lol I was
trying to use an ActionEvent instead of a WindowEvent ie:
Im on Slackware btw. (nothing but the best )
PS. I have also noticed that MPlayer does the same thing when you close it down.
you can see it in the System processes still running. I havent looked at their
code though.

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