键盘监听

//键盘监听
public class KeyboardListener {
    public static void main(String[] args) {
        new KeyFrame();
    }
}

class KeyFrame extends Frame{
    public KeyFrame(){
        setBounds(1,2,300,400);
        setVisible(true);

        this.addKeyListener(new KeyAdapter() {
            //键盘按下
            @Override
            public void keyPressed(KeyEvent e) {
                //获得键盘按下的键是哪个,键盘的码
                int keycode=e.getKeyCode();
                System.out.println(keycode);
                if (keycode==KeyEvent.VK_UP){
                    System.out.println("按下");
                }
            }
        });
    }
}