multilistenerdemo2.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 implements ActionListener
{
	TextField tf=new TextField(20);
	Button btn1=new Button("Ok");
	Button btn2=new Button("Cancel");

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

		btn1.addActionListener(this);
		btn2.addActionListener(this);

		setLayout(new FlowLayout());
		add(tf);
		add(btn1);
		add(btn2);
		setSize(200,150);
		setVisible(true);		
	}

	public void actionPerformed(ActionEvent e)
	{
		if(e.getActionCommand().equals("Ok"))
			tf.setText("你按了Ok按纽！");
		if(e.getActionCommand().equals("Cancel"))
			tf.setText("你按了Cancel按纽！");
		/*
		if((Button)e.getSource()==btn1)
			tf.setText("你按了Ok按纽！");
		else if((Button)e.getSource()==btn2)
			tf.setText("你按了Cancel按纽！");
		*/
	}

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