GUI编程10：窗口监听事件

视频链接：12、窗口监听事件_哔哩哔哩_bilibilihttps://www.bilibili.com/video/BV1DJ411B75F?p=12&vd_source=b5775c3a4ea16a5306db9c7c1c1486b5

1.使用成员内部类方式实现窗口监听

java 复制代码

ackage com.yundait.lesson03;

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

//主程序
public class TestWindow {
    public static void main(String[] args) {
        new WindowFrame();
    }
}

class WindowFrame extends Frame {
    public WindowFrame(){
        setBackground(Color.blue);
        setBounds(200,200,500,400);
        setVisible(true);
        addWindowListener(new MyWindowListener());
    }

    //创建窗口监听类，使用成员内部类方式实现。
    class MyWindowListener extends WindowAdapter{
        @Override
        public void windowClosing(WindowEvent e) {
            System.exit(0);
        }
    }
}

2.使用匿名内部类方式监听窗口

java 复制代码

package com.yundait.lesson03;

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

public class TestWindow01 {
    public static void main(String[] args) {
        new WindowsFrame01();
    }
}

//创建我的窗口类
class WindowsFrame01 extends Frame{
    //调用构造器方法进行初始化；
    public WindowsFrame01(){
        setBackground(Color.blue);
        setBounds(200,200,500,400);
        setVisible(true);

        //添加窗口监听事件，
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }//使用匿名内部类方式监听窗口关闭
        });
    }
}

3.窗口监听可实现的常用功能

java 复制代码

package com.yundait.lesson03;

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

public class TestWindow01 {
    public static void main(String[] args) {
        new WindowsFrame01();
    }
}

//创建我的窗口类
class WindowsFrame01 extends Frame{
    //调用构造器方法进行初始化；
    public WindowsFrame01(){
        setBackground(Color.blue);
        setBounds(200,200,500,400);
        setVisible(true);

        //添加窗口监听事件，
        addWindowListener(new WindowAdapter() {
            @Override //窗口被打开
            public void windowOpened(WindowEvent e) {
                System.out.println("windowOpened");
            }

            @Override //窗口正在关闭
            public void windowClosing(WindowEvent e) {
                System.out.println("windowClosing");
                System.exit(0);

            }

            @Override //窗口被关闭
            public void windowClosed(WindowEvent e) {
                System.out.println("windowClosed");
            }

            @Override //窗口被激活
            public void windowActivated(WindowEvent e) {
                WindowsFrame01 source = (WindowsFrame01)e.getSource();
                source.setTitle("窗口被激活了");
                System.out.println("windowActivated");
            }
        });
    }
}