Positioning of JButton

[Dhivya Krishnan]

I have used grouplayout for designing my screen. Button is placed in the left corner of the panel. I want it to be placed in the center of the panel. Please let me know your suggestions on this positioning a button or any component. The position of the component must be in the center of the screen, even if i maximize the screen.
Thanks in advance.

[Michael Dunn]

can't help with GroupLayout, but...

> The position of the component must be in the center of the screen, even if i maximize the screen.

    
import javax.swing.*;
import java.awt.*;
class Testing
{
  public void buildGUI()
  {
    JButton btn = new JButton("OK");
    JPanel p = new JPanel(new GridBagLayout());
    p.add(btn, new GridBagConstraints());

    JFrame f = new JFrame();
    f.getContentPane().add(p);
    f.setSize(600,400);
    f.setLocationRelativeTo(null);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
  }
  public static void main(String[] args)
  {
    SwingUtilities.invokeLater(new Runnable(){
      public void run(){
        new Testing().buildGUI();
      }
    });
  }
}