listenerdemo4.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 
class ListenerDemo extends Frame implements ActionListener
{
	TextField tf=new TextField(30);
	Button btn=new Button("请点这");
	
	public ListenerDemo() 
	{
		//super(title);

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

	public static void main(String args[])
	{
		ListenerDemo aa=new ListenerDemo();
		
		//aa.btn.addActionListener(aa);
	}
}