processeventdemo1.java

这是清华大学编写的JAVA教材中所有题目的源代码！

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

class MyButton extends Button
{
	private MyButton friend;
	
	public void setFriend(MyButton friend)
	{
		this.friend=friend;
	}
	
	public MyButton(String text)
	{
		super(text);
		enableEvents(AWTEvent.MOUSE_MOTION_EVENT_MASK);
	}
	
	protected void processMouseMotionEvent(MouseEvent e)
	{
		setVisible(false);
		friend.setVisible(true);
	}
}

class TestMyButton 
{
	public static void main(String args[])
	{
		MyButton btn1=new MyButton("你来抓我呀！");
		MyButton btn2=new MyButton("你来抓我呀！");
		btn1.setFriend(btn2);
		btn2.setFriend(btn1);

		Frame f=new Frame();
		f.add(btn1,BorderLayout.NORTH);
		f.add(btn2,BorderLayout.SOUTH);
		f.setSize(200,150);
		f.setVisible(true);		
		btn2.setVisible(false);		
	}
}