How to position JFrame on Screen

Hi
I am using Netbeans 5.0 for GUI. I want to specify a particular size to my JFrame and position it to the center of my screen.
How do i do that ?
I tried maximumBounds which works only when I maximize application window.
Is there any other property available in netbeans that i should use?
Thanks
Nagarajan

frame.setLocationRelativeTo( null );

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