怎么监听GUI右上角的关闭按钮

Question

怎么能做到点击GUI右上角的关闭按钮和点击自己定义的结束按钮一样效果，比如弹出一个对话框？

Answer 1

总共需要来那个个步骤：
首先：
setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
接着，
addWindowListener(new ExitAction());private final class ExitAction extends MouseAdapter implements WindowListener
{
private void close()
{
setVisible(false);
dispose();
} public void mouseReleased(MouseEvent e)
{
close();
} /*
 * (non-Javadoc)
 * 
 * @see java.awt.event.WindowListener#windowActivated(java.awt.event.WindowEvent)
 */
public void windowActivated(WindowEvent e)
{
} /*
 * (non-Javadoc)
 * 
 * @see java.awt.event.WindowListener#windowClosed(java.awt.event.WindowEvent)
 */
public void windowClosed(WindowEvent e)
{
} public void windowClosing(WindowEvent e)
{
close();
} /*
 * (non-Javadoc)
 * 
 * @see java.awt.event.WindowListener#windowDeactivated(java.awt.event.WindowEvent)
 */
public void windowDeactivated(WindowEvent e)
{
} /*
 * (non-Javadoc)
 * 
 * @see java.awt.event.WindowListener#windowDeiconified(java.awt.event.WindowEvent)
 */
public void windowDeiconified(WindowEvent e)
{
} /*
 * (non-Javadoc)
 * 
 * @see java.awt.event.WindowListener#windowIconified(java.awt.event.WindowEvent)
 */
public void windowIconified(WindowEvent e)
{
} /*
 * (non-Javadoc)
 * 
 * @see java.awt.event.WindowListener#windowOpened(java.awt.event.WindowEvent)
 */
public void windowOpened(WindowEvent e)
{
}
}

Answer 2

frame f = new frame();
f.addWindowListener(new WindowAdapter()
{
   public void windowClosing(WindowEvent e)
   {
}
});

Answer 3

frame f = new frame();
f.addWindowListener(new WindowAdapter()
{
   public void windowClosing(WindowEvent e)
   {
       System.exit(0);
   }
});

Answer 4

bovy(蓝狐狸) 写得太麻烦了，为什么要全部都写出来呢?