橘子味的心

处理WindowEvent的类应该实现此接口。该类的对象必须在组件中注册。可以使用addWindowListener()方法注册该对象。

接口声明

以下是java.awt.event.WindowListener接口的声明 -

public interface WindowListener
   extends EventListener

接口方法

编号	方法	描述说明
1	`void windowActivated(WindowEvent e)`	将Window设置为活动Window时调用。
2	`void windowClosed(WindowEvent e)`	由于在Window上调用丢弃而关闭窗口时调用。
3	`void windowClosing(WindowEvent e)`	当用户尝试从Window的系统菜单关闭Window时调用。
4	`void windowDeactivated(WindowEvent e)`	当Window不再是活动Window时调用。
5	`void windowDeiconified(WindowEvent e)`	当窗口从最小化状态更改为正常状态时调用。
6	`void windowIconified(WindowEvent e)`	当Window从正常状态更改为最小化状态时调用。
7	`void windowOpened(WindowEvent e)`	第一次使窗口可见时调用。

方法继承

此接口从以下接口继承方法 -

java.awt.EventListener

WindowListener示例

使用编辑器创建以下Java程序：WindowListenerDemo.java

package com.yiibai.swing.listener;


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

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

   public WindowListenerDemo(){
      prepareGUI();
   }
   public static void main(String[] args){
       WindowListenerDemo  swingListenerDemo = new WindowListenerDemo();  
      swingListenerDemo.showWindowListenerDemo();
   }
   private void prepareGUI(){
      mainFrame = new JFrame("Java SWING WindowListener示例(yiibai.com)");
      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 showWindowListenerDemo(){
      headerLabel.setText("Listener in action: WindowListener");      
      JButton okButton = new JButton("OK");

      aboutFrame = new JFrame();
      aboutFrame.setSize(300,200);;
      aboutFrame.setTitle("WindowListener示例");
      aboutFrame.addWindowListener(new CustomWindowListener());

      JPanel panel = new JPanel();      
      panel.setBackground(Color.white);            
      JLabel msglabel = new JLabel("欢迎您来到易百Swing教程"
         ,JLabel.CENTER);        
      panel.add(msglabel);
      aboutFrame.add(panel);
      aboutFrame.setVisible(true); 
   }
   class CustomWindowListener implements WindowListener {
      public void windowOpened(WindowEvent e) {
      }
      public void windowClosing(WindowEvent e) {
         aboutFrame.dispose();
      }
      public void windowClosed(WindowEvent e) {
      }
      public void windowIconified(WindowEvent e) {
      }
      public void windowDeiconified(WindowEvent e) {
      }
      public void windowActivated(WindowEvent e) {
      }
      public void windowDeactivated(WindowEvent e) {
      }
   }   
}

执行上面示例代码，得到以下结果：

标题：Swing WindowListener接口

接口声明

接口方法

方法继承

WindowListener示例

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