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1.添加 窗口事件监听器： addWindowListener( new 自定义的窗口监听器对象 

2.自定义 窗口监听器类，此类要实现一个java awt窗口监听器的接口( 名为WindowListener )

WindowListener 监听器接口：

*：这个接口必须把它所规定的六个抽象方法都实现了，分别是：

1.窗口被打开时触发：

windowOpened(WindowEvent e)

2.点击窗口右上角的 × 时触发：

windowClosing(WindowEvent e)

void windowClosed(WindowEvent e)

4.窗口被最小化时触发：

windowIconified(WindowEvent e)

windowDeiconified(WindowEvent e)

windowDeactivated(WindowEvent e)

windowActivated(WindowEvent e)

import java.awt.Frame;import java.awt.TextArea;import java.awt.event.WindowEvent;import java.awt.event.WindowListener;public class Windows {	private Frame f = new Frame("test windows");	private TextArea ta = new TextArea(6,40);		//文本框	public void init()	{		f.addWindowListener(new MyListener());	//添加窗口监听器		f.add(ta);		f.pack();		f.setVisible(true);	}	/*自定义窗口监听器*/	class MyListener implements WindowListener	{		public void windowOpened(WindowEvent e) {			ta.append("窗口打开");				ta.append("\n");		}		public void windowClosing(WindowEvent e) {			ta.append("窗口关闭ing");			ta.append("\n");			System.exit(0);		}		public void windowClosed(WindowEvent e) {			ta.append("窗口关闭了ed");			ta.append("\n");		}		public void windowIconified(WindowEvent e) {			ta.append("窗口最小化");			ta.append("\n");		}		public void windowDeiconified(WindowEvent e) {			ta.append("窗口恢复");			ta.append("\n");		}		public void windowActivated(WindowEvent e) {			ta.append("窗口被激活");			ta.append("\n");		}		public void windowDeactivated(WindowEvent e) {			ta.append("窗口失去焦点");		}			}		public static void main(String[] args)	{		new Windows().init();	}}

使用事件适配器版本：

WindowAdapter

2.只需要实现自己需要的方法即可，其余方法适配器会自动给它空实现（即什么都不做）

public class Windows {	private Frame f = new Frame("test windows");	private TextArea ta = new TextArea(6,40);		//文本框	public void init()	{		f.addWindowListener(new MyListener());	//添加窗口监听器		f.add(ta);		f.pack();		f.setVisible(true);	}	/*自定义窗口监听器*/	public class MyListener extends WindowAdapter	//让监听器直接继承适配器	{		public void windowClosing(WindowEvent e)	//自定义的windowClosing方法		{			ta.append("Close Window");			System.exit(0);		}				public void windowOpened(WindowEvent e)		//自定义WindowOpened的方法		{			ta.append("open Window");		}	}		public static void main(String[] args)	{		new Windows().init();	}}

使用适配器+匿名内部类版本（代码更简洁了）

public class Windows {	private Frame f = new Frame("test windows");	private TextArea ta = new TextArea(6,40);		//文本框	public void init()	{		f.addWindowListener(new WindowAdapter()		//匿名内部类。一次性的匿名类继承WindowAdapter适配器类，实现了windowClosing()方法				{					public void windowClosing(WindowEvent e)					{						System.out.println("close window");						System.exit(0);					}				}		);	//添加窗口监听器		f.add(ta);		f.pack();		f.setVisible(true);	}		public static void main(String[] args)	{		new Windows().init();	}}