listenerdemo2.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 ListenerDemo extends Frame 
{
	//static TextField tf=new TextField(30);
	TextField tf=new TextField(30);
	Button btn=new Button("请点这");

	public ListenerDemo(String title) 
	{
		super(title);

		btn.addActionListener(new ButtonListener());
		
		add(tf,BorderLayout.NORTH);
		add(btn,BorderLayout.SOUTH);
		setSize(300,200);
		setVisible(true);		
	}
	
	class ButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			//ListenerDemo.tf.setText("你按了按纽！");
			tf.setText("你按了按纽！");
		}
	}

	public static void main(String args[])
	{
		new ListenerDemo("监听器示例");
	}
}