监听事件相关

最新推荐文章于 2025-11-30 18:24:05 发布

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package com.han.lesson01;

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();
        MyActionListener  myActionListener=new MyActionListener();
        button.addActionListener(myActionListener);
        frame.add(button,BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
    }
    //关闭窗体的事件
    public static void WindowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

class MyActionListener implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("aaa");

    }


}

两个按钮实现同一个监听

package com.han.lesson01;
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
        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，如果不触发会有默认值
        button1.setActionCommand("button1-start");
        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) {
        System.out.println("按钮被点击了:msg"+e.getActionCommand());


    }
}

结果如下图