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Swing WindowListener接口

WindowEvent 類的對象必須實現這個接口。類處理一個組件必須注冊。使用addWindowListener()方法,該對象可以被注冊。

接口聲明

以下是聲明 java.awt.event.WindowListener接口:

public interface WindowListener
   extends EventListener

接口方法

S.N. 方法 & 描述
1 void windowActivated(WindowEvent e) 
Invoked when the Window is set to be the active Window.
2 void windowClosed(WindowEvent e) 
Invoked when a window has been closed as the result of calling dispose on the window.
3 void windowClosing(WindowEvent e) 
Invoked when the user attempts to close the window from the window's system menu.
4 void windowDeactivated(WindowEvent e) 
Invoked when a Window is no longer the active Window.
5 void windowDeiconified(WindowEvent e) 
Invoked when a window is changed from a minimized to a normal state.
6 void windowIconified(WindowEvent e) 
Invoked when a window is changed from a normal to a minimized state.
7 void windowOpened(WindowEvent e) 
Invoked the first time a window is made visible.

方法繼承

這個接口從以下接口繼承的方法:

  • java.awt.EventListener

WindowListener 例子

選擇使用任何編輯器創建以下java程序在 D:/ > SWING > com > yiibai > gui >

SwingListenerDemo.java
package com.yiibai.gui;

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

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

   public SwingListenerDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      SwingListenerDemo  swingListenerDemo = new SwingListenerDemo();  
      swingListenerDemo.showWindowListenerDemo();
   }

   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 showWindowListenerDemo(){
      headerLabel.setText("Listener in action: WindowListener");      

      JButton okButton = new JButton("OK");

      aboutFrame = new JFrame();
      aboutFrame.setSize(300,200);;
      aboutFrame.setTitle("WindowListener Demo");
      aboutFrame.addWindowListener(new CustomWindowListener());
      
      JPanel panel = new JPanel();      
      panel.setBackground(Color.white);            
      JLabel msglabel 
      = new JLabel("Welcome to TutorialsPoint SWING Tutorial."
      ,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) {
      }
   }   
}

編譯程序,使用命令提示符。到 D:/ > SWING 然後輸出以下命令。

D:SWING>javac comyiibaiguiSwingListenerDemo.java

如果冇有錯誤出現,這意味著編譯成功。使用下麵的命令來運行程序。

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

驗證下麵的輸出

SWING WindowListener