package com.sheng.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestActionEvent {
    public static void main(String[] args) {
        //按下按钮，触发一些事件
        Frame frame = new Frame();
        Button button = new Button();

        //因为，addActionListener()需要一个ActionListener,所以我们需要构造一个ActionListener
        MyActionListner myActionListner = new MyActionListner();
        button.addActionListener(myActionListner);

        frame.add(button,BorderLayout.CENTER);
        frame.pack();
        windowClose(frame);//关闭窗口
        frame.setVisible(true);


    }
    //关闭窗体的事件
    private static void windowClose(Frame a){
        a.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                System.exit(0);
            }
        });
    }
}
//事件监听
class MyActionListner implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("aaa");
    }
}

 

 

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多个按钮，共享一个事件

package com.sheng.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TestActionTwo {
    public static void main(String[] args) {
        //两个按钮，实现同一个监听
        //开始   停止
        Frame frame = new Frame("开始-停止");
        Button button1 = new Button("start");
        Button button2 = new Button("stop");

        //可以显示的定义触发会返回的命令，如果不显示定义，则会走默认的值！
        //可以多个按钮只写一个监听类
        button2.setActionCommand("button2-stop");

        MyMonitor myMonitor = new MyMonitor();
        button1.addActionListener(myMonitor);
        button2.addActionListener(myMonitor);

        frame.add(button1,BorderLayout.NORTH);
        frame.add(button2,BorderLayout.SOUTH);

        frame.pack();
        frame.setVisible(true);
    }
}

class MyMonitor implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        // e.getActionCom
        System.out.println("按钮被点击了：msg=>"+e.getActionCommand());

    }
}