贪吃蛇小游戏

贪吃蛇

B站：狂神说Java

帧，如果时间片足够小，就是动画，一秒30帧，60帧。 连起来是动画，拆开就是静态的图片!

键盘监听

定时器Timer

StartGame类

package com.mike.snake;
 
import javax.swing.*;
 
//游戏的主启动类
public class StartGame {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setTitle("贪吃蛇");
        frame.setBounds(10,10,900,720);
        frame.setResizable(false);//窗口大小不可变
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //正常游戏界面都应该在面上!
        frame.add(new GamePanel());
        frame.setVisible(true);
    }
}

Data类

package com.mike.snake;
 
import sun.net.www.content.image.png;
 
import javax.swing.*;
import java.net.URL;
 
//数据中心
public class Data {
 
    public static URL headerURL = Data.class.getResource("statics/header05.png");
    public static ImageIcon header = new ImageIcon(headerURL);
 
    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);
 
    public static URL bodyURL = Data.class.getResource("statics/body.png");
    public static ImageIcon body = new ImageIcon(bodyURL);
 
    public static URL foodURL = Data.class.getResource("statics/food.png");
    public static ImageIcon food = new ImageIcon(foodURL);
 
}

GamePanel类

package com.mike.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
    //蛇的方向
    String fx;
 
    //食物的坐标
    int foodx;
    int foody;
 
    //产生随机数
    Random random = new Random();
 
    //积分数据
    int score;//成绩
 
    //游戏当前的状态:开始，停止
    boolean isStart = false;//默认是不开始！
 
    //游戏初始默认是不失败
    boolean isFail =false;
 
    //定时器 以ms为单位1000ms = 1s（设置的太大，蛇就会跑的越快）
    Timer timer =new Timer(100,this);//100毫秒刷新(执行)一次
 
//=========================================================================================
    //构造器
    public GamePanel() {
        init();
        //获得焦点和键盘事件
        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(){
        //初始蛇的数据
        length = 3;
        snakeX[0] = 100;snakeY[0] = 100;//脑袋的坐标
        snakeX[1] = 75;snakeY[1] = 100;//第一个身体的坐标
        snakeX[2] = 50;snakeY[2] = 100;//第二个身体的坐标
        fx = "R";//初始方向向右
 
        //把食物随机分布到34*24的界面上!
        foodx = 25 + 25*random.nextInt(34);
        foody = 75 + 25*random.nextInt(24);
 
        //初始分数为0
        score = 0;
    }
//=========================================================================================
    //绘制面板，我们游戏中的所有东西，都是用这个画笔来画
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);//清屏的作用
        //绘制静态的面板
        this.setBackground(Color.WHITE);
//=========================================================================================
        //画顶部广告栏
        Data.header.paintIcon(this,g,25,8);//头部广告栏画上去
        g.fillRect(25,75,850,600);//默认的游戏界面
 
//=========================================================================================
        //画积分
        g.setColor(Color.PINK);
        g.setFont(new Font("微软雅黑",Font.BOLD,19));
        g.drawString("长度："+length,750,40);
        g.drawString("分数："+score,750,60);
 
//=========================================================================================
        //画食物
        Data.food.paintIcon(this,g,foodx,foody);
 
//=========================================================================================
        //把小蛇画上去
        if (fx.equals("R")){
            Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向右,需要通过方向来判制
        }else  if (fx.equals("L")){
            Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向右,需要通过方向来判制
        }else  if (fx.equals("U")){
            Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向右,需要通过方向来判制
        }else  if (fx.equals("D")){
            Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向右,需要通过方向来判制
        }
 
        for (int i = 1; i < length; i++) {
            Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);//第一个身体的坐标
        }
 
//=========================================================================================
        //画初始的游戏状态，按下空格开始游戏
        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",300,400);
        }
 
        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",200,400);
        }
    }
//=========================================================================================
    //键盘监听事件，键盘监听器
    @Override
    public void keyPressed(KeyEvent e) {
        int keyCode = e.getKeyCode();//获得键盘按键是哪一个
        if (keyCode == KeyEvent.VK_SPACE){//如果按下的是空格键，就让蛇动起来
            if (isFail){
                //重新开始
                isFail = false;
                init();
            }else {
                isStart = !isStart;//取反
            }
            repaint();
        }
        //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--需要通过固定的时间来刷新，1秒10次
    @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!
 
            //吃食物
            if (snakeX[0] == foodx && snakeY[0] ==foody){
                //长度+1
                length++;
                //分数吃一个就加10
                score = score + 10;
                //再次随机食物
                foodx = 25 + 25*random.nextInt(34);
                foody = 75 + 25*random.nextInt(24);
            }
 
            //移动
            for (int i = length-1; i >0 ; i--) {//后一节移到前一节的位置   snakeX[1] = snakeX[0]
                snakeX[i] = snakeX[i-1];//向前移一节（格）
                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;
                //边界判断
                if (snakeX[0]<25){
                    snakeX[0] = 850;
                }
            }else if (fx.equals("U")){
                snakeY[0] = snakeY[0]-25;
                //边界判断
                if (snakeY[0]<75){
                    snakeY[0] = 650;
                }
            }else if (fx.equals("D")){
                snakeY[0] = snakeY[0]+25;
                //边界判断
                if (snakeY[0]>650){
                    snakeY[0] = 75;
                }
            }
 
            //失败判断的事件,撞到自己就算失败
            for (int i = 1; i < length; i++) {
                if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){
                    isFail = true;
                }
            }
            repaint();//重画页面
        }
        timer.start();//定时器开启
    }
 
    //下面两个用不到就折叠起来不去管它
    @Override
    public void keyReleased(KeyEvent e) {
 
    }
 
    @Override
    public void keyTyped(KeyEvent e) {
    }
}

运行截图