processeventdemo2.java

来自「这是清华大学编写的JAVA教材中所有题目的源代码！」· Java 代码 · 共 34 行

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

class MyButton extends Button
{
	public MyButton(String text)
	{
		super(text);
		enableEvents(AWTEvent.MOUSE_EVENT_MASK);
	}
	
	protected void processMouseEvent(MouseEvent e)
	{
		if(e.getID()==MouseEvent.MOUSE_PRESSED)
			setLabel("Pressed");
		else if(e.getID()==MouseEvent.MOUSE_RELEASED)
			setLabel("Released");
	}
}

class TestMyButton 
{
	public static void main(String args[])
	{
		MyButton btn=new MyButton("请按这里");

		Frame f=new Frame();
		f.setLayout(new FlowLayout());
		f.add(btn);
		f.setSize(200,150);
		f.setVisible(true);		
	}
}