Source Code : How to center a frame or dialog

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How to center a frame or dialog

    
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class CenteredFrame extends JFrame {
  public CenteredFrame() {
    setTitle("CenteredFrame");
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    Toolkit tk = Toolkit.getDefaultToolkit();
    Dimension screenSize = tk.getScreenSize();
    int screenHeight = screenSize.height;
    int screenWidth = screenSize.width;
    setSize(screenWidth / 2, screenHeight / 2);
    setLocation(screenWidth / 4, screenHeight / 4);
  }

  public static void main(String[] args) {
    JFrame frame = new CenteredFrame();
    frame.show();
  }
}
           
         
    
    
    
  

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