WindowAdapter类接收窗口事件是一个抽象类（适配器）。这个类的所有方法都是空的。这个类是方便的类创建监听器对象。

类声明

以下是声明 java.awt.event.WindowAdapter类：

public abstract class WindowAdapter
   extends Object
      implements WindowListener, WindowStateListener, WindowFocusListener

类构造函数

S.N.	构造函数 & 描述
1	WindowAdapter()

类方法

S.N.	方法 & 描述
1	void windowActivated(WindowEvent e)  Invoked when a window is activated.
2	void windowClosed(WindowEvent e)  Invoked when a window has been closed.
3	void windowClosing(WindowEvent e)  Invoked when a window is in the process of being closed.
4	void windowDeactivated(WindowEvent e)  Invoked when a window is de-activated.
5	void windowDeiconified(WindowEvent e)  Invoked when a window is de-iconified.
6	void windowGainedFocus(WindowEvent e)  Invoked when the Window is set to be the focused Window, which means that the Window, or one of its subcomponents, will receive keyboard events.
7	void windowIconified(WindowEvent e)  Invoked when a window is iconified.
8	void windowLostFocus(WindowEvent e)  Invoked when the Window is no longer the focused Window, which means that keyboard events will no longer be delivered to the Window or any of its subcomponents.
9	void windowOpened(WindowEvent e)  Invoked when a window has been opened.
10	void windowStateChanged(WindowEvent e)  Invoked when a window state is changed.

方法继承

这个类从以下类继承的方法：

• java.lang.Object

WindowAdapter 例子

选择使用任何编辑器创建以下java程序在 D:/ > SWING > com > yiibai > gui >

SwingAdapterDemo.java

package com.yiibai.gui;

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

public class SwingAdapterDemo {
   private JFrame mainFrame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel;

   public SwingAdapterDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      SwingAdapterDemo  swingAdapterDemo = new SwingAdapterDemo();        
      swingAdapterDemo.showWindowAdapterDemo();
   }

   private void prepareGUI(){
      mainFrame = new JFrame("Java SWING Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      headerLabel = new JLabel("",JLabel.CENTER );
      statusLabel = new JLabel("",JLabel.CENTER);        

      statusLabel.setSize(350,100);
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
	        System.exit(0);
         }        
      });    
      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }

   
   private void showWindowAdapterDemo(){
      headerLabel.setText("Listener in action: WindowAdapter");      

      JButton okButton = new JButton("OK");

      final JFrame aboutFrame = new JFrame();
      aboutFrame.setSize(300,200);;
      aboutFrame.setTitle("WindowAdapter Demo");
      aboutFrame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent){
               aboutFrame.dispose();
         }        
      });    
      JLabel msglabel 
      = new JLabel("Welcome to TutorialsPoint SWING Tutorial."
      ,JLabel.CENTER);
	  aboutFrame.add(msgLabel);
      aboutFrame.setVisible(true);
   }
}

编译程序，使用命令提示符。到 D:/ > SWING 然后输出以下命令。

D:SWING>javac comyiibaiguiSwingAdapterDemo.java

如果没有错误出现，这意味着编译成功。使用下面的命令来运行程序。

D:SWING>java com.yiibai.gui.SwingAdapterDemo

验证下面的输出