Graphical User Interfaces - Java - page 567

reminder that, on Swing, you should just use setDefaultCloseOperation() . If you're writ-
ing an AWT-only application, you'll have to live with the deprecation warning.

Example 14-5. WindowCloser.java
package package com . darwinsys . swingui ;

import import java.awt.Window java.awt.Window ;

import import java.awt.event.WindowAdapter java.awt.event.WindowAdapter ;

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

/** A WindowCloser - watch for Window Closing events, and
* follow them up with setVisible(false), dispose(), and optionally
* ends (it all) with a System.exit(0).
* @deprecated For simple closing, just use JFrame.setDefaultCloseOperation().
*/
public public class class WindowCloser WindowCloser extends extends WindowAdapter {

/** The window we are to close */
Window win ;

/** True if we are to exit as well. */
boolean boolean doExit = false false ;

/** Construct a WindowCloser that doesn't exit, just closes the window */
public

public WindowCloser ( Window w ) {
this

this ( w , false false );

}

/** Construct a WindowCloser with control over whether it exits */
public

public WindowCloser ( Window w , boolean boolean exit ) {

win = w ;
doExit = exit ;

}

/** Called by AWT when the user tries to close the window */
public

public void void windowClosing ( WindowEvent e ) {

win . setVisible ( false false );

win . dispose ();
iif ( doExit )
System . exit ( 0 );

}

}

Using it is straightforward: