multilistenerdemo3.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 41 行

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

class ListenerDemo extends Frame
{
	TextField tf=new TextField(30);
	Button btn=new Button("请点这");

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

		btn.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				tf.setText(tf.getText()+" 第二次处理");
			}
		});

		btn.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				tf.setText(tf.getText()+" 第一次处理");
			}
		});
		
		
		add(tf,BorderLayout.NORTH);
		add(btn,BorderLayout.SOUTH);
		setSize(300,200);
		setVisible(true);		
	}

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