eventqs.java

疯狂Java讲义_源码(含Java设计模式CHM

import java.awt.*;
import java.awt.event.*;
/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class EventQs
{
	private Frame f = new Frame("测试事件");
	private Button ok = new Button("确定"); 
	private TextField tf = new TextField(30);
	public void init()
	{
		//注册事件监听器
		ok.addActionListener(new OkListener());
		f.add(tf);
		f.add(ok , BorderLayout.SOUTH);
		f.pack();
		f.setVisible(true);
	}
	//定义事件监听器类
	class OkListener implements ActionListener
	{
		//下面定义的方法就是事件处理器，用于响应特定的事件
		public void actionPerformed(ActionEvent e)
		{
			System.out.println("用户单击了ok按钮");
			tf.setText("Hello World");
		}
	}
	public static void main(String[] args) 
	{
		new EventQs().init();
	}
}