利用java实现一个简单的贪吃蛇小游戏

GUI编程实现贪吃蛇小游戏

（推荐教程：java课程）

1、编写主方法实现启动类

2、准备好素材图片，编写数据类

3、代码主体部分：在panel面板上实现游戏初始化，键盘和事件的监听等功能

4、代码运行效果图

5、GitHub源码链接

1、编写主方法实现启动类

		import javax.swing.*;
        //主启动类
 		public class StartGame {
 	    public static void main(String[] args) {
        JFrame jFrame = new JFrame("贪吃蛇小游戏");
        jFrame.setBounds(10,10,900,720);
        jFrame.setResizable(false);  //设置窗口大小不可变
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //面板
        jFrame.add(new GamePanel());
        jFrame.setVisible(true);
    }
}

2、准备好素材图片，编写数据类

import javax.swing.*;
import java.net.URL;


public class Data {
    //头部图片
    public static URL headerURL = Data.class.getResource("statics/header.png");
    public static ImageIcon header = new ImageIcon(headerURL);
    //头部上下左右
    public static URL upURL = Data.class.getResource("statics/up.png");
    public static URL downURL = Data.class.getResource("statics/down.png");
    public static URL leftURL = Data.class.getResource("statics/left.png");
    public static URL rightURL = Data.class.getResource("statics/right.png");
    public static ImageIcon up = new ImageIcon(upURL);
    public static ImageIcon down = new ImageIcon(downURL);
    public static ImageIcon left = new ImageIcon(leftURL);
    public static ImageIcon right = new ImageIcon(rightURL);
    //身体
    public static URL bodyURL = Data.class.getResource("statics/body.png");
    public static ImageIcon body = new ImageIcon(bodyURL);
    //食物
    public static URL foodURL = Data.class.getResource("statics/food.png");
    public static ImageIcon food = new ImageIcon(foodURL);

}

3、代码主体部分：在panel面板上实现游戏初始化，键盘和事件的监听等功能

package com.abc.snake;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;

//游戏的面板
public class GamePanel extends JPanel implements KeyListener, ActionListener {
    //定义蛇的数据结构
    int length; //蛇的长度
    int[] snakeX = new int[600];  //蛇的x坐标  25*25
    int[] snakeY = new int[500];  //蛇的y坐标  25*25
    String fx;
    //食物
    int foodx;
    int foody;
    Random random = new Random();
    int score;  //游戏分数
    //游戏当前的状态
    boolean isStart = false;
    boolean isFail = false;  
    //定时器
    Timer timer = new Timer(100,this);//100毫秒刷新一次
    //构造方法
    public GamePanel() {
        init();//初始化
        this.setFocusable(true);  //获得焦点事件
        this.addKeyListener(this);  //获得键盘监听事件
        timer.start();  //游戏一开始 定时器就启动
    }

    //初始化方法
    public void init(){
        length = 3;
        //初始化开始的蛇，给蛇定位
        snakeX[0] = 100;snakeY[0] = 100;
        snakeX[1] = 75;snakeY[1] = 100;
        snakeX[2] = 50;snakeY[2] = 100;
        fx = "R";         //初始方向向右
        //初始化食物数据
        foodx = 25 + 25*random.nextInt(34);
        foody = 75 + 25*random.nextInt(24);
        //初始化游戏分数
        score = 0;
    }


    //绘制面板
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);//清屏
        this.setBackground(Color.white);//设置面板背景色
        Data.header.paintIcon(this,g,25,11);//头部
        g.fillRect(25,75,850,600);//默认的黑色游戏区域

        //绘制小蛇
        if (fx.equals("R")){
            Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);  //蛇头初始化向右
        }else if (fx.equals("L")){
            Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);  //蛇头初始化向左
        }else if (fx.equals("U")){
            Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);  //蛇头初始化向上
        }else if (fx.equals("D")){
            Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);  //蛇头初始化向下
        }
        for (int i = 1; i < length; i++) {
            Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
        }

        //食物
        Data.food.paintIcon(this,g,foodx,foody);
        //积分
        g.setColor(Color.white);
        g.setFont(new Font("微软雅黑",Font.BOLD,18));
        g.drawString("长度 "+length,750,35);
        g.drawString("分数 "+score,750,50);
        //游戏状态
        if (isStart == false){
            g.setColor(Color.white);
            g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
            g.drawString("按下空格开始游戏",300,300);
        }
        //失败判断
        if (isFail){
            g.setColor(Color.red);
            g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
            g.drawString("游戏失败，按下空格重新开始",300,300);
        }
    }
    
    //键盘监听事件
    @Override
    public void keyPressed(KeyEvent e) {
        int keyCode = e.getKeyCode();  //获取按键
        if (keyCode == KeyEvent.VK_SPACE){
            if (isFail){
                //重新开始
                isFail=false;
                init();
            }else {
                isStart =! isStart; 
            }
            repaint();
        }

        //键盘控制小蛇移动
        if (keyCode==KeyEvent.VK_UP){
            fx="U";
        }else if (keyCode==KeyEvent.VK_DOWN){
            fx="D";
        }else if (keyCode==KeyEvent.VK_LEFT){
            fx="L";
        }else if (keyCode==KeyEvent.VK_RIGHT){
            fx="R";
        }
    }
    //事件监听
    @Override
    public void actionPerformed(ActionEvent e) {
        if (isStart && isFail ==false){//如果游戏是开始状态，就让小蛇动起来
            //移动
            for (int i = length-1; i > 0 ; i--) {
                snakeX[i] = snakeX[i-1];
                snakeY[i] = snakeY[i-1];
            }
            //走向
            if (fx.equals("R")){
                snakeX[0] = snakeX[0]+25;
                //边界判断
                if (snakeX[0]>850){
                    snakeX[0]=25;
                }
            }else if (fx.equals("L")){
                snakeX[0] = snakeX[0]-25;
                if (snakeX[0]<25){
                    snakeX[0]=850;
                }
            }else if (fx.equals("U")){
                snakeY[0] = snakeY[0]-25;
                if (snakeY[0]<75){
                    snakeY[0]=650;
                }
            }else if (fx.equals("D")){
                snakeY[0] = snakeY[0]+25;
                if (snakeY[0]>650){
                    snakeY[0]=75;
                }
            }
            //吃食物
            if (snakeX[0] == foodx && snakeY[0] == foody){
                length++;
                score  = score + 10;
                //再次随机食物
                foodx = 25 + 25*random.nextInt(34);
                foody = 75 + 25*random.nextInt(24);
            }
            //失败判定,撞到自己
            for (int i = 1; i < length; i++) {
                if (snakeX[0]==snakeX[i] && snakeY[0]==snakeY[i]){
                    isFail=true;
                }
            }
            repaint();
        }
        timer.start();
    }
    @Override
    public void keyTyped(KeyEvent e) {
    }
    @Override
    public void keyReleased(KeyEvent e) {
    }
}

4、代码运行效果图

初始化界面:

游戏中界面：

游戏结束界面：

相关推荐：java入门

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