[Java] ActionEvent 事件处理

import java.awt.*;
import java.awt.event.*;
public class ActionEventTest{
public static void main(String[] args){
//创建frame and Button
Frame f = new Frame("ActionEventTest");
Button bStart = new Button("Start");
Button bStop = new Button("Stop");

//给button组件加班ActionListener,
bStart.addActionListener(new ButtonActionEvent());
//设置bStop按钮的ActionCommand为 "Game Over"
bStop.setActionCommand("Game Over!");
bStop.addActionListener(new ButtonActionEvent());

//设置frame的布局并添加button
f.setLayout(new BorderLayout());
f.add(bStart,BorderLayout.NORTH);
f.add(bStop,BorderLayout.SOUTH);

//设置frame属性
f.setLocationByPlatform(true);
f.pack();
f.setVisible(true);
}
}
//创建 ActionListener 类,用接口的方法
class ButtonActionEvent implements ActionListener{
//重写 actionPerformed()方法
public void actionPerformed(ActionEvent e){
//输出ActionCommand的内容
System.out.println(e.getActionCommand());
}
}

//actionCommand属性用于记录按钮/菜单类组件所激发的ActionEvent事件相关指令信息