贪吃蛇

//主启动类

package cn.rushangw.sanke;

import javax.swing.*;

//游戏的主启动类
public class StartGame {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setBounds(10,10,900,720);
        frame.setResizable(false);//窗口大小不可变
        frame.add(new GamePanel());

        //正常的游戏都应该放在面板上
        frame.setVisible(true);
    }
}

//画笔，事件监听类

package cn.rushangw.sanke;

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];//蛇的坐标25*25
    int[] snakeY = new int[500];//蛇的坐标25*25
    String fx;
    //食物的坐标
    int foodx;
    int foody;
    Random random = new Random();

    int score; //成绩

    //游戏当前的状态  开始  结束
    boolean isStart = false;  //默认是不开始

    boolean isFail = false;  //游戏失败的状态
    //定时器  以毫秒为单位   1000ms = 1s
    Timer timer = new Timer(100,this);  //100毫秒执行一次！
    //构造器
    public GamePanel() {
        this.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
        foodx = 25 + 25*random.nextInt(34);
        foody = 75 + 25*random.nextInt(24);

        score = 0;
    }

    //初始化方法
    public void init(){
        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";  //初始化方向向右
    }
    //绘制面板，我们游戏的东西都使用这个画笔来画
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);//清屏
        //绘制静态的面板
        this.setBackground(Color.WHITE);
        Data.header.paintIcon(this,g,25,11); //头部广告栏画上去
        g.fillRect(25,75,850,600);

        //画积分
        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);



        //画食物的坐标
        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
        }else if(fx.equals("L")){
            Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);  //蛇头初始化向右
        }else if(fx.equals("U")){
            Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);  //蛇头初始化向右
        }else if(fx.equals("D")){
            Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);  //蛇头初始化向右
        }

        for (int i = 1; i < length; i++) {
            Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);  //蛇的第一个身体的坐标
        }

        //游戏状态
        if(isStart==false){
            g.setColor(Color.white);
            //设置字体
            g.setFont(new Font("微软雅黑",Font.BOLD,40));
            g.drawString("按下空格开始游戏",300,300);
        }
        if(isFail){
            g.setColor(Color.red);
            //设置字体
            g.setFont(new Font("微软雅黑",Font.BOLD,40));
            g.drawString("失败，按下空格重新开始！",300,300);
        }


    }


    //键盘监听事件
    @Override
    public void keyPressed(KeyEvent e) {
        //获得键盘的按键是哪一个
        int keyCode= e.getKeyCode();
        if(keyCode == KeyEvent.VK_SPACE){  //如果按下的是空格键
            if(isFail){
                //重新开始
                isFail = false;
                init();
            }else {
                isStart=!isStart;
            }
            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，1s 10次
    @Override
    public void actionPerformed(ActionEvent e) {
        if(isStart && isFail==false){  //如果游戏是开始状态
            //吃食物
            if(snakeX[0] == foodx && snakeY[0] == foody){
                length++; //长度加+1
                score+=10; //分数加10
                //再次生成随机食物
                foodx = 25 + 25*random.nextInt(34);
                foody = 25 + 25*random.nextInt(24);
            }
            //右移
            for (int i = length-1; i > 0 ; i--) {   //后一节移动到前一节的位置
                snakeX[i] = snakeX[i-1];
                snakeY[i] = snakeY[i-1];
            }
            //走向
            if(fx.equals("R")){
                snakeX[0] = snakeX[0]+25;
                if(snakeX[0] > 850){snakeX[0] = 25;}//边界判断
            }
            if(fx.equals("L")){
                snakeX[0] = snakeX[0] - 25;
                if(snakeX[0] < 25){snakeX[0] = 850;}//边界判断
            }
            if(fx.equals("U")){
                snakeY[0] = snakeY[0] - 25;
                if(snakeY[0] < 75){snakeY[0] = 650;}//边界判断
            }
            if(fx.equals("D")){
                snakeY[0] = snakeY[0] + 25;
                if(snakeY[0] > 650){snakeY[0] = 75;}//边界判断
            }
            //失败判定，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
    }



    @Override
    public void keyReleased(KeyEvent e) {

    }

    @Override
    public void keyTyped(KeyEvent e) {

    }


}

//资源图片类

package cn.rushangw.sanke;

import com.sun.org.apache.xpath.internal.res.XPATHErrorResources_pt_BR;

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

//数据中心
public class Data {

    public static URL headerURL = Data.class.getResource("statics/header.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);

}