windoweventdemo.java

来自「《java事件处理指南》一书的代码,好东西」· Java 代码 · 共 35 行

import java.awt.*;
import java.awt.event.*;

public class WindowEventDemo extends Frame 
{
   public WindowEventDemo()
   {
/*  The Frame registers a WindowListener.  */

      addWindowListener(new WinAdapter());
      setBounds(100, 100, 300, 200);
      setVisible(true);
   }

   public static void main(String args[])
   {
      WindowEventDemo demo = new WindowEventDemo();
   }
}

/*  This WindowListener does not need access to the private data    */
/*  members of the WindowEventDemo class (if there were any), so    */
/*  it can be implemented as a separate class that extends the      */
/*  WindowAdapter class.  The windowClosing() method is overridden  */
/*  to terminate the program if the window is closed.               */

class WinAdapter extends WindowAdapter
{
   public void windowClosing(WindowEvent event) 
   {
      System.exit(0);
   }
}