Java JFrame handle window state changed event

import java.awt.event.WindowEvent;
import java.awt.event.WindowStateListener;

import javax.swing.JFrame;

class My implements WindowStateListener {

   public void windowStateChanged(WindowEvent e) {
      System.out.println("WindowStateListener method called: windowStateChanged.");
    }/*from   w ww  .  j  a v a2s. c  o m*/
}

public class Main {

   public static void main(String[] args) {
      JFrame window = new JFrame("java2s.com");
      window.setBounds(30, 30, 300, 300);
      window.addWindowStateListener(new My());
      window.setVisible(true);

   }
}