package ch8.action;
import java.awt.*;
import java.awt.event.*;
import java.util.Date;

/**
 * 11.事件监听器展示2,事件三部分:实现事件接口的类、重写事件处理方法、事件注册
 * 事件监听器是一种Observer设计模式
 */
public class TestActionEvent2 {
 public static void main(String args[]) {
			Frame f = new Frame("Test");
			Button b1 = new Button("Start");
			Button b2 = new Button("Stop");
			Monitor2 bh = new Monitor2();
			b1.addActionListener(bh); 
			b2.addActionListener(bh);
			b2.setActionCommand("game over"); //某一个actioncommand设置了,没有设置的即显示上面的文字。
			f.add(b1,"North"); 
			f.add(b2,"Center");	
			f.pack(); 		
			f.setVisible(true);
 }
}

class Monitor2 implements ActionListener {
 public void actionPerformed(ActionEvent e) {
 	System.out.println("a button has been pressed," + 
 	"the relative info is:\n " + e.getActionCommand() +","+ new Date(e.getWhen())); 
	}
}