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