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Java实现简单贪吃蛇游戏-附PPT介绍
2023-06-16 22:55:11 深夜i     --     --
Java 贪吃蛇 游戏编程

贪吃蛇是一款经典的小游戏，它的玩法简单而有趣，能够带给人们愉悦的游戏体验。利用Java语言，我们可以轻松地实现一个简单的贪吃蛇游戏，下面来介绍一下实现的过程。

首先，我们需要创建一个窗体，作为我们游戏的界面。然后，我们需要定义一个蛇的类，包括蛇头、蛇身和蛇尾等部分。在蛇类中，我们还需要定义一些方法，如“移动”、“增加长度”、“判断是否吃到食物”等。

接着，我们需要定义一个食物类，表示游戏中需要吃的食物。该类主要包含食物的位置、食物被吃掉的方法等。

最后，我们需要定义一个控制类，该类主要负责控制游戏的运行和更新。在控制类中，我们需要实现键盘监听事件，接收玩家的方向控制，同时还需要不断检测蛇与食物的接触等。

下面是一些Java代码案例，实现了蛇的移动和食物的生成，记得另外导入必要的组件库。



import java.awt.*;


import javax.swing.*;


public class Snake extends JPanel {


  private static final long serialVersionUID = 1L;


  private static final int WIDTH = 500;


  private static final int HEIGHT = 500;


  private static final int DOT_SIZE = 10;


  private static final int ALL_DOTS = 900;


  private final int snakeX[] = new int[ALL_DOTS];


  private final int snakeY[] = new int[ALL_DOTS];


  private int dots;


  private int foodX;


  private int foodY;


  private boolean leftDirection = false;


  private boolean rightDirection = true;


  private boolean upDirection = false;


  private boolean downDirection = false;


  private boolean inGame = true;


  private Timer timer;


  private Image ball;


  private Image apple;


  private Image head;


  public Snake() {


    initGame();


  }


  private void initGame() {


    addKeyListener(new TAdapter());


    setBackground(Color.black);


    setPreferredSize(new Dimension(WIDTH, HEIGHT));


    setFocusable(true);


    loadImages();


    initDots();


    initFood();


    timer = new Timer(140, this);


    timer.start();


  }


  private void loadImages() {


    ImageIcon iid = new ImageIcon("src/resources/dot.png");


    ball = iid.getImage();


    ImageIcon iia = new ImageIcon("src/resources/apple.png");


    apple = iia.getImage();


    ImageIcon iih = new ImageIcon("src/resources/head.png");


    head = iih.getImage();


  }


  private void initDots() {


    dots = 3;


    for (int z = 0; z < dots; z++) {


      snakeX[z] = 50 - z * 10;


      snakeY[z] = 50;


    }


  }


  private void initFood() {


    foodX = (int) (Math.random() * WIDTH / DOT_SIZE) * DOT_SIZE;


    foodY = (int) (Math.random() * HEIGHT / DOT_SIZE) * DOT_SIZE;


  }


  @Override


  protected void paintComponent(Graphics g) {


    super.paintComponent(g);


    doDrawing(g);


  }


  private void doDrawing(Graphics g) {


    if (inGame) {


      g.drawImage(apple, foodX, foodY, this);


      for (int z = 0; z < dots; z++) {


        if (z == 0) {


          g.drawImage(head, snakeX[z], snakeY[z], this);


        } else {


          g.drawImage(ball, snakeX[z], snakeY[z], this);


        }


      }


      Toolkit.getDefaultToolkit().sync();


    } else {


      gameOver(g);


    }


  }


  private void gameOver(Graphics g) {


    String msg = "Game Over";


    Font small = new Font("Helvetica", Font.BOLD, 14);


    FontMetrics metr = getFontMetrics(small);


    g.setColor(Color.white);


    g.setFont(small);


    g.drawString(msg, (WIDTH - metr.stringWidth(msg)) / 2, HEIGHT / 2);


  }


  private void move() {


    for (int z = dots; z > 0; z--) {


      snakeX[z] = snakeX[(z - 1)];


      snakeY[z] = snakeY[(z - 1)];


    }


    if (leftDirection) {


      snakeX[0] -= DOT_SIZE;


    }


    if (rightDirection) {


      snakeX[0] += DOT_SIZE;


    }


    if (upDirection) {


      snakeY[0] -= DOT_SIZE;


    }


    if (downDirection) {


      snakeY[0] += DOT_SIZE;


    }


  }


  private void checkFood() {


    if ((snakeX[0] == foodX) && (snakeY[0] == foodY)) {


      dots++;


      initFood();


    }


  }


  private void checkCollision() {


    for (int z = dots; z > 0; z--) {


      if ((z > 4) && (snakeX[0] == snakeX[z]) && (snakeY[0] == snakeY[z]))


        inGame = false;


      


    }


    if (snakeY[0] >= HEIGHT)


      inGame = false;


    


    if (snakeY[0] < 0)


      inGame = false;


    


    if (snakeX[0] >= WIDTH)


      inGame = false;


    


    if (snakeX[0] < 0)


      inGame = false;


    


    if (!inGame) {


      timer.stop();


    }


  }


  private class TAdapter extends KeyAdapter {


    @Override


    public void keyPressed(KeyEvent e) {


      int key = e.getKeyCode();


      if ((key == KeyEvent.VK_LEFT) && (!rightDirection))


        leftDirection = true;


        upDirection = false;


        downDirection = false;


      


      if ((key == KeyEvent.VK_RIGHT) && (!leftDirection))


        rightDirection = true;


        upDirection = false;


        downDirection = false;


      


      if ((key == KeyEvent.VK_UP) && (!downDirection))


        upDirection = true;


        rightDirection = false;


        leftDirection = false;


      


      if ((key == KeyEvent.VK_DOWN) && (!upDirection))


        downDirection = true;


        rightDirection = false;


        leftDirection = false;


      


    }


  }


  @Override


  public void actionPerformed(ActionEvent e) {


    if (inGame) {


      checkFood();


      checkCollision();


      move();


    }


    repaint();


  }


  public static void main(String[] args) {


    JFrame frame = new JFrame("贪吃蛇");


    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


    frame.getContentPane().add(new Snake());


    frame.pack();


    frame.setLocationRelativeTo(null);


    frame.setVisible(true);


  }


}

最后，附上Java简单贪吃蛇的PPT介绍，方便大家学习和使用。

  
  

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