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用Java编写贪吃蛇游戏教程——基于Eclipse开发环境
2023-06-15 17:04:10 深夜i     --     --
Java

众所周知,贪吃蛇是一款经典的小游戏,很多人会在空闲时间玩一玩。想必很多程序员也希望自己能够编写一款属于自己的贪吃蛇游戏。本文将提供一份Java实现贪吃蛇游戏的代码教程,并且使用Eclipse作为开发环境,让您轻松上手。

1. 环境搭建

首先,我们需要使用Eclipse来进行Java的开发。如果您还没有安装Eclipse开发环境,请先前往Eclipse官网下载相应的版本进行安装。安装完毕后,我们需要使用Eclipse的插件管理器来安装Java Development Kit(JDK)。

2. 初始化项目

打开Eclipse,按下Ctrl+Shift+N打开新建项目对话框,选择Java项目,输入项目名称和项目路径后,点击“Finish”按钮来完成项目的创建。

3. 编写代码

接下来,我们需要让贪吃蛇能够在窗口中进行运行,因此需要编写GUI相关的代码。我们使用Java自带的Swing组件库来完成此任务。

在新建的项目中,创建一个新的Java类,将其命名为“Snake”(或者自己喜欢的任意名称),然后输入以下代码:


import java.awt.Color;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Rectangle;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class Snake extends JPanel {

  private static final long serialVersionUID = 1L;

  private static final int WIDTH = 300;

  private static final int HEIGHT = 300;

  private static final int DOT_SIZE = 10;

  private static final int ALL_DOTS = 900;

  private static final int RAND_POS = 29;

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

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

  private int dots;

  private int apple_x;

  private int apple_y;

  private boolean left = false;

  private boolean right = true;

  private boolean up = false;

  private boolean down = false;

  private boolean inGame = true;

  public Snake() {

    addKeyListener(new TAdapter());

    setBackground(Color.black);

    setFocusable(true);

    setPreferredSize(new Dimension(WIDTH, HEIGHT));

    initGame();

  }

  public void initGame() {

    dots = 3;

    for (int z = 0; z < dots; z++) {

      x[z] = 50 - z * DOT_SIZE;

      y[z] = 50;

    }

    locateApple();

  }

  public void locateApple() {

    int r = (int) (Math.random() * RAND_POS);

    apple_x = ((r * DOT_SIZE));

    r = (int) (Math.random() * RAND_POS);

    apple_y = ((r * DOT_SIZE));

  }

  public void checkApple() {

    if ((x[0] == apple_x) && (y[0] == apple_y)) {

      dots++;

      locateApple();

    }

  }

  public void checkCollision() {

    for (int z = dots; z > 0; z--) {

      if ((z > 4) && (x[0] == x[z]) && (y[0] == y[z]))

        inGame = false;

      

    }

    if (y[0] >= HEIGHT)

      inGame = false;

    

    if (y[0] < 0)

      inGame = false;

    

    if (x[0] >= WIDTH)

      inGame = false;

    

    if (x[0] < 0)

      inGame = false;

    

    if (!inGame)

      // Timer has expired

    

  }

  public void move() {

    for (int z = dots; z > 0; z--) {

      x[z] = x[(z - 1)];

      y[z] = y[(z - 1)];

    }

    if (left) {

      x[0] -= DOT_SIZE;

    }

    if (right) {

      x[0] += DOT_SIZE;

    }

    if (up) {

      y[0] -= DOT_SIZE;

    }

    if (down) {

      y[0] += DOT_SIZE;

    }

  }

  @Override

  public void paintComponent(Graphics g) {

    super.paintComponent(g);

    doDrawing(g);

  }

  public void doDrawing(Graphics g) {

    if (inGame) {

      g.setColor(Color.red);

      g.fillRect(apple_x, apple_y, DOT_SIZE, DOT_SIZE);

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

        if (z == 0) {

          g.setColor(Color.green);

          g.fillRect(x[z], y[z], DOT_SIZE, DOT_SIZE);

        } else {

          g.setColor(Color.yellow);

          g.fillRect(x[z], y[z], DOT_SIZE, DOT_SIZE);

        }

      }

      //sync();

    } else {

      gameOver(g);

    }

  }

  public void gameOver(Graphics g) {

    String msg = "Game Over";

    g.setColor(Color.red);

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

  }

  private class TAdapter implements KeyListener {

    @Override

    public void keyReleased(KeyEvent e)

    

    @Override

    public void keyPressed(KeyEvent e) {

      int key = e.getKeyCode();

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

        left = true;

        up = false;

        down = false;

      

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

        right = true;

        up = false;

        down = false;

      

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

        up = true;

        right = false;

        left = false;

      

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

        down = true;

        right = false;

        left = false;

      

    }

    @Override

    public void keyTyped(KeyEvent e)

    

  }

}

4. 运行游戏

我们可以通过创建一个JFrame类的实例来运行我们的游戏。将以下代码插入到Snake类中:


public static void main(String[] args) {

  JFrame frame = new JFrame("Snake");

  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  frame.setSize(WIDTH, HEIGHT);

  frame.add(new Snake());

  frame.setLocationRelativeTo(null);

  frame.setVisible(true);

}

5. 编译和运行

现在我们已经完成了Java编写贪吃蛇游戏的所有代码!我们可以将其保存,然后使用Eclipse的编译功能来生成可执行文件。再次运行您的贪吃蛇游戏,并享受这个有趣的小游戏吧!

文章关键词:

Java, 贪吃蛇, 代码, Eclipse, 开发, 游戏, GUI, Swing, JFrame, 小游戏, 实现

  
  

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