Java BlueJ根本没有运行keyadapter

基本上我的键盘适配器不会运行。打印什么是钥匙并不重要。 但它是一个指示器，用于查看该方法是否正在运行，或者问题是否出在我的移动方法上。

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既然没有打印，那么方法本身就没有运行。因此，这不是我的移动方法。一定是这个适配器。我只是想知道为什么它不起作用。我已经设置了焦点，这是所有其他论坛说要做的。所以请帮忙。提前感谢

在

setFocusable

之后添加

requestFocusInWindow

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.sound.sampled.*;
import java.util.ArrayList;

public class Board extends JPanel implements ActionListener
{
Timer time;
Image Border;
Image Dude;
Image Road;
Image GZombie;
Image RZombie;
Image BZombie;
MovingPiece player;

public Board()
{
//set this window to be the one receiving keystrokes
addKeyListener(new AL());
setFocusable(true);
ImageIcon dude = new ImageIcon("Dude.png");            //player
Dude=dude.getImage();       
                   //      Cx and Cy are changed in move methods, they are change in (x/y)   
                   //  X   Y  W  H  CxCy Speed Image
player=new MovingPiece(200,300,50,50,0,0,2,Dude);
time=new Timer(5,this);
time.start();
}

public void actionPerformed(ActionEvent e){   
player.setX(player.getX() + player.getCx()); //adds my x to my change in x
player.setY(player.getY() + player.getCy()); //im sure u can figure this one out...
//redraw the screen
repaint();
}

public void paint(Graphics g){        
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
g2d.drawImage(player.getImage(),player.getX(),player.getY(),null);  //draw player
}

//the key listener, it is a private class inside of the Board class

private class AL extends KeyAdapter{

public void keyPressed(KeyEvent e){           
int key = e.getKeyCode();
System.out.println(key);        //*THIS IS WHAT WONT RUN*
if(key==KeyEvent.VK_W){player.moveUp();}        //this changes my cy to be -speed which is -2
if(key==KeyEvent.VK_A){player.moveDown();}      //this changes my cy to be speed which is 2
if(key==KeyEvent.VK_S){player.moveLeft();}      //I made this simple.. this is cx
if(key==KeyEvent.VK_D){player.moveRight();}     //take a guess. 
}

public void keyReleased(KeyEvent e){
int key = e.getKeyCode();
if(key==KeyEvent.VK_W){player.setCy(0);}        //stops my changes in y so I don't move up/down
if(key==KeyEvent.VK_A){player.setCx(0);}        //quite repetitive. 
if(key==KeyEvent.VK_S){player.setCy(0);}
if(key==KeyEvent.VK_D){player.setCx(0);}
    }
 }   
}