Swing WindowListener介面

處理WindowEvent的類應該實現此介面。該類的對象必須在組件中註冊。可以使用addWindowListener()方法註冊該對象。

介面聲明

以下是java.awt.event.WindowListener介面的聲明 -

public interface WindowListener
   extends EventListener

介面方法

方法繼承

此介面從以下介面繼承方法 -

• java.awt.EventListener

WindowListener示例

使用編輯器創建以下Java程式：WindowListenerDemo.java

package com.zaixian.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(xuhuhu.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("歡迎您來到線上789Swing教學"
         ,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) {
      }
   }
}

執行上面示例代碼，得到以下結果：