WindowAdapter
类是一个用于接收窗口事件的抽象(适配器)类。此类的所有方法都是空的。此类是用于创建侦听器对象的便捷类。
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
编号 | 构造函数 | 描述说明 |
---|---|---|
1 | WindowAdapter() |
无参数构造函数 |
类方法
编号 | 类方法 | 描述说明 |
---|---|---|
1 | void windowActivated(WindowEvent e) |
激活窗口时调用。 |
2 | void windowClosed(WindowEvent e) |
窗口关闭时调用。 |
3 | void windowClosing(WindowEvent e) |
窗口正处于关闭状态时调用。 |
4 | void windowDeactivated(WindowEvent e) |
取消激活窗口时调用。 |
5 | void windowDeiconified(WindowEvent e) |
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。 |
7 | void windowIconified(WindowEvent e) |
在图标化窗口时调用。 |
8 | void windowLostFocus(WindowEvent e) |
当窗口不再是焦点窗口时调用。 |
9 | void windowOpened(WindowEvent e) |
打开窗口时调用。 |
10 | void windowStateChanged(WindowEvent e) |
更改窗口状态时调用。 |
方法继承
该类继承以下类中的方法 -
java.lang.Object
WindowAdapter示例
使用编辑器创建以下Java程序: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示例(yiibai.com)");
aboutFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
aboutFrame.dispose();
}
});
JLabel msglabel
= new JLabel("欢迎来到易百教程/Swing",JLabel.CENTER);
aboutFrame.add(msglabel);
aboutFrame.setVisible(true);
}
}
执行上面示例代码,得到以下结果: