How do I add a countdowwn timer to my project???

I guess the title says it all :)

Sounds like a job for a Swing Timer to me.

That's the question. How do i use one? :)

First hit for googling "how to use a swing timer": How to Use Swing Timers (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Other Swing Features)