Forcing JFrame to lose its focus programatically

Hello everyone,
I have a JFrame with a button over it. Now I wants that when I click on the button,
my JFrame should lose its focus.
Can anybody tell me whether it is possible in java or not?
Thanks in advance.

It depends upon the underlying OS
On Windows XP it goes to the last application which was in focus.
For eg- If I first open up a notepad and after that my java application the once my application loses its focus it should go to notepad.
But i think that will be handled by the OS itself because when you minimizes an application then the application which had the focus before this one will automatically get the focus.

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