AWT WindowAdapter 类
简介
类 WindowAdapter 是用于接收窗口事件的抽象(适配器)类。此类的所有方法均为空。此类是创建侦听器对象的便利类。
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
| S.N. | 构造函数 &描述 |
|---|---|
| 1 | WindowAdapter() |
类方法
| S.N. | 方法 &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) 当窗口正在关闭时调用。 |
| 4 | void windowDeactivated(WindowEvent e) 当窗口被停用时调用。 |
| 5 | void windowDeiconified(WindowEvent e) 当窗口取消图标化时调用。 |
| 6 | void windowGainedFocus(WindowEvent e) 当窗口设置为焦点窗口时调用，这意味着窗口或其子组件之一将接收键盘事件。 |
| 7 | void windowIconified(WindowEvent e) 当窗口被图标化时调用。 |
| 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) 当窗口状态发生更改时调用。 |
继承的方法
此类从以下类继承方法:
java.lang.Object
WindowAdapter示例
使用您选择的任何编辑器在 D:/ > AWT > com > tutorialspoint > gui > 中创建以下 Java 程序
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 utorialspoint\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_event_adapters.html
