JAVA 键盘监听当中，释放键盘并没有停止运动

Question

package plane;

import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import util.GameUtil;
import util.MyFrame;


//定义图片出现的初始位置
public class PlaneGameFrame extends MyFrame{
    Image bg = GameUtil.getImage("backgroundIMG/bg.png");
    Plane p = new Plane("backgroundIMG/3.png",20,20);

    public void paint(Graphics g) {
        g.drawImage(bg,0,0,null);
        p.draw(g);
    }
    
    
    public static void main(String[] args) {
        new PlaneGameFrame().launchFrame();
    
    }
    
    public void launchFrame() {
        super.launchFrame();
        //增加键盘监听
        addKeyListener(new KeyMonitor());
    }
    
    
//    定义为内部类，可方便使用外部的普通属性
    class KeyMonitor extends KeyAdapter{
         public void keyPressed(KeyEvent e) {
             System.out.println("按下："+e.getKeyCode());
         switch(e.getKeyCode()) {
         case 37:
            p.left = true;
             break;
         case 39:
             p.right = true;
            break;
         case 38:
             p.up = true;
            break;
         case 40:
             p.down = true;
            break;
        default:
            break;
         }
        }
         }

          public void keyReleased(KeyEvent e) {
                System.out.println("释放："+e.getKeyCode());
                 switch(e.getKeyCode()) {
                 case 37:
                    p.left = true;
                     break;
                 case 39:
                     p.right = true;
                    break;
                 case 38:
                     p.up = true;
                    break;
                 case 40:
                     p.down = true;
                    break;
                default:
                    break;
                 }
            }
    }





这是窗口加载的代码

package plane;

import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyEvent;

import util.GameUtil;

public class Plane {

Image img;
double x,y;
int speed = 10;
boolean left,up,right,down;


public void draw(Graphics g)
{
    g.drawImage(img,(int)x,(int)y,null);
    move();
}


public Plane(String imgpath, double x, double y) {
    super();
    this.img = GameUtil.getImage(imgpath);
    this.x = x;
    this.y = y;
}

public Plane() {
    
}


public void move() {
    
    if(left) {
        x -= speed;
        
    }
    if(right) {
        x += speed;
        
    }
    if(up) {
        y -= speed;
    }
    if(down) {
        y += speed;
    }
    
    
}

}

这个是运动物体的类

求助各位帮我看下到底哪里除了问题
显示的结果是，按方向键确实可以移动，可是释放键并不停止移动

Answer 1

第一我发现我提这个问题时候没有注意提问的礼仪，我的代码粘贴并没有完善好就发布出来了 第二，是我自己粗心问题没看到程序有个细节写错了`public void keyReleased(KeyEvent e) { System.out.println("释放："+e.getKeyCode()); switch(e.getKeyCode()) { case 37: p.left = true; break; case 39: p.right = true; break; case 38: p.up = true; break; case 40: p.down = true; break; default: break; } }` 只要把上面的true改过成false就可以了