键盘监听

package com.kuang.lesson02;

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

public class TestKeyListener {
public static void main(String[] args) {
new KeyFrame();
}
}
class KeyFrame extends Frame{
public KeyFrame() {
setBounds(1,2,300,400);
setVisible(true);
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});

this.addKeyListener(new KeyAdapter() {
//键盘按下
public void keyPressed(KeyEvent e) {
//获得键盘下的键是哪一个，当前的码
int KeyCode=e.getKeyCode();//不需要去记录这个数值，直接使用静态属性VK_XXX
System.out.println(KeyCode);
if(KeyCode==KeyEvent.VK_2){
System.out.println("你按下了数字2");
}
}
});
}
}