java swing set jframe to center of screen

/**
 * @author lautturi.com 
 * Java example: Jframe in middle of screen
 */

import java.util.*;
import javax.swing.JFrame;

public class Lautturi {

	public static void main(String[] args) {

		JFrame frame = new JFrame();

		frame.setTitle("My First GUI");
		frame.setSize(500,300);
		frame.setLocationRelativeTo(null); // put jframe in center of screen
		frame.setVisible(true);
	}
}