actionlistener Java KeyListener不工作

Question

这让我整天都想把头发扯下来。我试着让它，当我按下向右箭头键时，我的速度会下降到10。我知道让我的精灵移动的方法是有效的，因为如果我事先设置了一个值，它就会在屏幕上移动。是KeyListener什么都没做：

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;

public class Sprite implements KeyListener{
    public Image player = Toolkit.getDefaultToolkit().getImage("player.png");
    int x, y, dx, dy;

    public void doInit(){
        JFrame window = new JFrame();
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setSize(600, 400);
        window.setLocationRelativeTo(null);
        window.getContentPane().add(new ImageDraw());
        window.setVisible(true);
        window.setIgnoreRepaint(true);
        window.createBufferStrategy(2);
        window.getContentPane().addKeyListener(this);
    }

    public Image getSpriteHandle(){
        return player;
    }

    public void keyPressed(KeyEvent e) {
        int keyCode = e.getKeyCode();
        if(keyCode == KeyEvent.VK_RIGHT){
                dx = 10;
         }
    }   //end keyPressed

    public void keyReleased(KeyEvent e) {
        int keyCode = e.getKeyCode();
        if(keyCode == KeyEvent.VK_RIGHT){
                dx = 0;
         }
    }

    public void keyTyped(KeyEvent arg0) {

    } 

    public int moveX(){
        return dx;
    }

}   //end class

请帮帮我

Answer 1

It's the KeyListener that isn't doing anything

您不应该使用KeyListener

Swing设计用于Key Bindings。即使组件没有焦点，也可以将动作映射到击键