用GUI实现java版贪吃蛇小游戏

 public class GameStart{ public static void main(String[] args) { JFrame jFrame = new JFrame(); jFrame.setBounds(100,100,900,720); jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); jFrame.setResizable(false); jFrame.add(new GameJPanel()); jFrame.setVisible(true); } }

 //面板 public class GameJPanel extends JPanel implements ActionListener { int length;//蛇的长度 int[] snakeX = new int[600];//蛇的X的最大长度 int[] snakeY = new int[500];//蛇的Y的最大长度 String fx = "R"; boolean isStart = false;//默认不开始 //定时器 Timer timer = new Timer(100, this);//100毫秒=1秒 int foodX; int foodY; Random random = new Random();//随机数 boolean isFail = false;//失败条件 int score; public GameJPanel() { init(); this.setFocusable(true);//获取焦点事件 addKeyListener(new GameKeyListener(this)); //开启定时器 timer.start(); } //初始化 void init() { length = 3; snakeX[0] = 100; snakeY[0] = 100;//第一个身体 snakeX[1] = 75; snakeY[1] = 100;//第二个身体 snakeX[2] = 50; snakeY[2] = 100;//第三个身体 fx = "R"; //食物随机分布 foodX = 25 + 25 * random.nextInt(34); foodY = 75 + 25 * random.nextInt(24); score = 0; } //绘制面板,所有东西都是通过graphics这个画笔绘制 @Override protected void paintComponent(Graphics graphics) { super.paintComponent(graphics);//清屏 //添加静态布局 GameData.header.paintIcon(this, graphics, 25, 11); graphics.fillRect(25, 75, 850, 600); //积分板 graphics.setColor(Color.white); graphics.setFont(new Font("微软雅黑", Font.BOLD, 18)); graphics.drawString("长度："+length,750,35); graphics.drawString("得分："+score,750,55); //先画食物，防止吃掉有延迟 GameData.food.paintIcon(this, graphics, foodX, foodY); //画小蛇 switch (fx) { case "R": GameData.right.paintIcon(this, graphics, snakeX[0], snakeY[0]); break; case "L": GameData.left.paintIcon(this, graphics, snakeX[0], snakeY[0]); break; case "U": GameData.up.paintIcon(this, graphics, snakeX[0], snakeY[0]); break; case "D": GameData.down.paintIcon(this, graphics, snakeX[0], snakeY[0]); break; } //身体 for (int i = 1; i  0; i--) { snakeX[i] = snakeX[i - 1]; snakeY[i] = snakeY[i - 1]; } switch (fx) { case "R": snakeX[0] += 25;//头部移动 // 边界判断 if (snakeX[0] > 850) { snakeX[0] = 25; } break; case "L": snakeX[0] -= 25;//头部移动 if (snakeX[0] <25) { snakeX[0] = 850; } break; case "U": snakeY[0] -= 25;//头部移动 if (snakeY[0] <75) { snakeY[0] = 650; } break; case "D": snakeY[0] += 25;//头部移动 if (snakeY[0] > 650) { snakeY[0] = 75; } break; } //失败判定 for (int i = 1; i