title: Close current window and pop out previous (windowListener)
body: <p>I have a server/client app. When the system is started a login window pops out. When Connect clicked - another JFrame (the Game frame) pops out. What I want is: 
  when the 'X' on the Game frame is clicked - the game, for the current user, to be stopped and the login window to pop-out back again. </p>
  
  <p>In short - when 'X' is clicked - terminate current process, close the window and pop-out the previous window.
  What is left is just to implement the 'windowClosing()' method, but I don't have a clue how.
  Here's what I have:</p>
  
  <pre><code>    import java.awt.BorderLayout;
      import java.awt.Dimension;
      import java.awt.Toolkit;
      import java.awt.event.WindowAdapter;
      import java.awt.event.WindowEvent;
      import javax.swing.JFrame;
  
      public class GameplayFrame extends JFrame {
  
      private GECanvas canvas;
  
      public GameplayFrame() {
          super("BattleCity");
          canvas = new GECanvas();
          getContentPane().setLayout(new BorderLayout());
          canvas.setPreferredSize(new Dimension(600, 600));
          getContentPane().add(canvas, BorderLayout.CENTER);
          setResizable(false);
          pack();
          Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
          int x = (dim.width - getSize().width) / 2;
          int y = (dim.height - getSize().height) / 2;
          setLocation(x, y);
          setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
          addWindowListener(new NaBabaMiShortite());
      }
  
      private class NaBabaMiShortite extends WindowAdapter {
  
          @Override
          public void windowClosing(WindowEvent e) {
  
                  // TO-DO
          }
      }
  
      public GECanvas getCanvas() {
          return canvas;
      }
  }
  </code></pre>