Countdown clock not working

hello friends,
i want to add a countdown clock to a JLabel that starts when i click a start button. I have tried, but cudnt do it. actually it has to happen with other things running in the background,
thats whats hapenin when i run the code:
the program gets stalled for the specified time. i have used
thread.sleep() method maybe thats y its happening. i am a bit uncomfortable with threads so if u can help me.

http://forum.java.sun.com/thread.jspa?threadID=5227982&tstart=0
reading this may help you better articulate your problem to us, allowing us to better help you with your problem

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