GUI 键盘监听事件

编写代码 TestKeyListener测试类

package com.xiang.lesson03;

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

//键盘事件
public class TestKeyListener {
    public static void main(String[] args) {
        new KeyFrame("键盘事件");
    }
}

class KeyFrame extends Frame {
    public KeyFrame(String title) {
        super(title);
        setVisible(true);
        setBounds(2, 2, 400, 500);
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowActivated(WindowEvent e) {
                System.out.println("windowActivated");
            }

            @Override
            public void windowClosing(WindowEvent e) {
                System.out.println("windowClosing");
                System.exit(0);
            }
        });
        addKeyListener(new KeyAdapter() {
            //            键盘按下
            @Override
            public void keyReleased(KeyEvent e) {
//                获取键盘按下的键
                //获取 状态的码
                int keyCode = e.getKeyCode();
                System.out.println(keyCode);
                if (keyCode == KeyEvent.VK_0) {
                    System.out.println("你按下了数字键 0 ");
                }
            }

        });
    }
}

运行结果