AWT WindowAdapter 类



简介

WindowAdapter 类是一个用于接收窗口事件的抽象(适配器)类。此类中的所有方法都是空的。此类是创建监听器对象的便捷类。

类声明

以下是java.awt.event.WindowAdapter类的声明

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

类构造函数

序号构造函数和描述
1

WindowAdapter()

类方法

序号方法和描述
1

void windowActivated(WindowEvent e)

当窗口被激活时调用。

2

void windowClosed(WindowEvent e)

当窗口已关闭时调用。

3

void windowClosing(WindowEvent e)

当窗口正在关闭过程中调用。

4

void windowDeactivated(WindowEvent e)

当窗口被停用时调用。

5

void windowDeiconified(WindowEvent e)

当窗口被还原时调用。

6

void windowGainedFocus(WindowEvent e)

当窗口被设置为焦点窗口时调用,这意味着窗口或其子组件将接收键盘事件。

7

void windowIconified(WindowEvent e)

当窗口被最小化时调用。

8

void windowLostFocus(WindowEvent e)

当窗口不再是焦点窗口时调用,这意味着键盘事件将不再传递到窗口或其任何子组件。

9

void windowOpened(WindowEvent e)

当窗口已打开时调用。

10

void windowStateChanged(WindowEvent e)

当窗口状态改变时调用。

继承的方法

此类继承自以下类的方法

  • java.lang.Object

WindowAdapter 示例

使用您选择的任何编辑器创建以下 Java 程序,例如在D:/ > AWT > com > tutorialspoint > gui >

AwtAdapterDemo.java
package com.tutorialspoint.gui;

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

public class AwtAdapterDemo {
   private Frame mainFrame;
   private Label headerLabel;
   private Label statusLabel;
   private Panel controlPanel;

   public AwtAdapterDemo(){
      prepareGUI();
   }

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

   private void prepareGUI(){
      mainFrame = new Frame("Java AWT Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      headerLabel = new Label();
      headerLabel.setAlignment(Label.CENTER);
      statusLabel = new Label();        
      statusLabel.setAlignment(Label.CENTER);
      statusLabel.setSize(350,100);

      controlPanel = new Panel();
      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");      

      Button okButton = new Button("OK");

      final Frame aboutFrame = new Frame();
      aboutFrame.setSize(300,200);;
      aboutFrame.setTitle("WindowAdapter Demo");
      aboutFrame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent){
               aboutFrame.dispose();
         }        
      });    
      Label msgLabel = new Label("Welcome to tutorialspoint.");
      msgLabel.setAlignment(Label.CENTER);
      msgLabel.setSize(100,100);
      aboutFrame.add(msgLabel);
      aboutFrame.setVisible(true);
   }
}

使用命令提示符编译程序。转到D:/ > AWT并键入以下命令。

D:\AWT>javac com\tutorialspoint\gui\AwtAdapterDemo.java

如果没有错误,则表示编译成功。使用以下命令运行程序。

D:\AWT>java com.tutorialspoint.gui.AwtAdapterDemo

验证以下输出

AWT WindowAdapter
awt_event_adapters.htm
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