Centered JFrame

This example displays the JFrame in the center of the screen, irrespective of the screen resolution.

The variable jf is the JFrame variable. This example can be applied to other Dialog/Window objects such as JDialog, JWindow, etc.

import java.awt.*;
import javax.swing.*;

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Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
jf.setLocation((d.width-jf.getWidth())/2, (d.height-jf.getHeight())/2);
jf.setVisible(true);