Swing WindowAdapter類 - tw511教學網

WindowAdapter類是一個用於接收視窗事件的抽象(介面卡)類。此類的所有方法都是空的。此類是用於建立偵聽器物件的便捷類。

類宣告

以下是java.awt.event.WindowAdapter類的宣告 -

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

類建構函式

編號	建構函式	描述說明
1	`WindowAdapter()`	無引數建構函式

類方法

編號	類方法	描述說明
1	`void windowActivated(WindowEvent e)`	啟用視窗時呼叫。
2	`void windowClosed(WindowEvent e)`	視窗關閉時呼叫。
3	`void windowClosing(WindowEvent e)`	視窗正處於關閉狀態時呼叫。
4	`void windowDeactivated(WindowEvent e)`	取消啟用視窗時呼叫。
5	`void windowDeiconified(WindowEvent e)`	視窗取消圖示化時呼叫。
6	`void windowGainedFocus(WindowEvent e)`	當視窗設定為焦點視窗時呼叫。
7	`void windowIconified(WindowEvent e)`	在圖示化視窗時呼叫。
8	`void windowLostFocus(WindowEvent e)`	當視窗不再是焦點視窗時呼叫。
9	`void windowOpened(WindowEvent e)`	開啟視窗時呼叫。
10	`void windowStateChanged(WindowEvent e)`	更改視窗狀態時呼叫。

方法繼承

該類繼承以下類中的方法 -

java.lang.Object

WindowAdapter範例

使用編輯器建立以下Java程式：WindowAdapter.java

package com.yiibai.swing.listener;

import javax.swing.*;

import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.*;

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

   public WindowAdapterDemo(){
      prepareGUI();
   }
   public static void main(String[] args){
       WindowAdapterDemo  swingAdapterDemo = new WindowAdapterDemo();        
      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範例(tw511.com)");

      aboutFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            aboutFrame.dispose();
         }        
      });    
      JLabel msglabel 
         = new JLabel("歡迎來到易百教學/Swing",JLabel.CENTER);
       aboutFrame.add(msglabel);
      aboutFrame.setVisible(true);
   }
}

執行上面範例程式碼，得到以下結果：
WindowAdapter示例