Java实现简易GUI贪吃蛇小游戏

本文实例为大家分享了java实现贪吃蛇小游戏的具体代码，供大家参考，具体内容如下

主启动类

import javax.swing.*;

/**
 * @author the setting sun
 * @create 2021-09-11 15:19
 */
//主启动类
public class startgame {
    public static void main(string[] args) {
        jframe frame = new jframe();

        frame.setresizable(false);//窗口大小不可变
        frame.setsize(900, 720);//窗口大小
        frame.setlocationrelativeto(null);//窗口居中
        frame.setdefaultcloseoperation(windowconstants.exit_on_close);//窗口关闭事件

        frame.add(new gamepanel());

        frame.setvisible(true);//窗口可见
    }
}

资源类（图标）

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

/**
@author the setting sun
@create 2021-09-11 15:40
*/
public class data {
    public static url headerurl = data.class.getresource("img/header.png");
    public static imageicon header = new imageicon(headerurl);

    public static url upurl = data.class.getresource("img/tx.png");
    public static imageicon up = new imageicon(upurl);

    public static url downurl = data.class.getresource("img/down.png");
    public static imageicon down = new imageicon(downurl);

    public static url righturl = data.class.getresource("img/right.png");
    public static imageicon right = new imageicon(righturl);

    public static url lefturl = data.class.getresource("img/left.png");
    public static imageicon left = new imageicon(lefturl);

    public static url bodyurl = data.class.getresource("img/body.png");
    public static imageicon body = new imageicon(bodyurl);

    public static url foodurl = data.class.getresource("img/food.png");
    public static imageicon food = new imageicon(foodurl);
}

程序类

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.random;

/**
 * @author the setting sun
 * @create 2021-09-11 15:24
 */
//游戏面板
public class gamepanel extends jpanel implements keylistener, actionlistener {
    //蛇
    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 orient;//初始方向

    //食物
    int foodx;
    int foody;
    random random = new random();

    boolean isstart = false;//游戏当前状态：默认为停止
    boolean isfail = false;//游戏是否失败了，默认为没有

    int score;//积分

    //定时器 ms为单位
    timer timer = new timer(140, this);//100毫秒刷新一次

    //构造器
    public gamepanel() {
        init();//初始化
        setfocusable(true);//获得焦点
        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
    public void init() {
        length = 3;//初始长度为3

        snakex[0] = 100;
        snakey[0] = 100;//头的坐标

        snakex[1] = 75;
        snakey[1] = 100;//第1个身体的坐标

        snakex[2] = 50;
        snakey[2] = 100;//第2个身体的坐标

        orient = "r";//初始方向向右

        //让食物随机分布在界面上
        foodx = 25 + 25 * random.nextint(34);
        foody = 75 + 25 * random.nextint(24);

        score = 0;//积分
    }


    //绘制面板，游戏中的东西都用这个来画
    @override
    protected void paintcomponent(graphics g) {
        super.paintcomponent(g);//清屏
        setbackground(color.pink);

        //绘制静态面板
        data.header.painticon(this, g, 25, 11);
        g.fillrect(25, 75, 850, 600);

        //绘制积分面板
        g.setcolor(color.green);
        g.setfont(new font("微软雅黑", font.bold, 16));
        g.drawstring("长度：" + length, 750, 35);
        g.drawstring("积分：" + score, 750, 50);

        //绘制食物
        data.food.painticon(this, g, foodx, foody);

        //绘制蛇
        switch (orient) {
            case "r":
                data.right.painticon(this, g, snakex[0], snakey[0]);//蛇初始化向右，通过判断转变方向
                break;
            case "l":
                data.left.painticon(this, g, snakex[0], snakey[0]);//蛇初始化向右，通过判断转变方向
                break;
            case "u":
                data.up.painticon(this, g, snakex[0], snakey[0]);//蛇初始化向右，通过判断转变方向
                break;
            case "d":
                data.down.painticon(this, g, snakex[0], snakey[0]);//蛇初始化向右，通过判断转变方向
                break;
        }


        //动态添加身体
        for (int i = 1; i < length; i++) {
            data.body.painticon(this, g, snakex[i], snakey[i]);
        }
//        data.body.painticon(this,g,snakex[1],snakey[1]);//第1个身体的坐标
//        data.body.painticon(this,g,snakex[2],snakey[2]);//第2个身体的坐标

        //游戏状态
        if (isstart == false) {
            g.setcolor(color.white);
            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);
            g.setfont(new font("微软雅黑", font.bold, 40));
            g.drawstring("犹豫就会败北！", 300, 300);
        }
    }

    //键盘监听器
    @override
    public void keypressed(keyevent e) {//按下
        int keycode = e.getkeycode();//获得键盘按键码

        if (keycode == keyevent.vk_space) {//按下空格
            if (isfail) {
                //重新开始
                isfail = false;
                init();
            } else {
                isstart = !isstart;//取反
                repaint();
            }
        }

        //修复了一个蛇可以反向移动的bug
        if (orient.equals("u") && keycode == keyevent.vk_down){
            keycode = keyevent.vk_up;
        }

        if (orient.equals("d") && keycode == keyevent.vk_up){
            keycode = keyevent.vk_down;
        }

        if (orient.equals("l") && keycode == keyevent.vk_right){
            keycode = keyevent.vk_left;
        }

        if (orient.equals("r") && keycode == keyevent.vk_left){
            keycode = keyevent.vk_right;
        }

        //控制蛇改变方向移动
        switch (keycode) {
            case keyevent.vk_up:

                orient = "u";
                break;
            case keyevent.vk_down:
                orient = "d";
                break;
            case keyevent.vk_left:
                orient = "l";
                break;
            case keyevent.vk_right:
                orient = "r";
                break;
        }


    }

    //事件监听：需要通过固定事件来刷新，1秒10次（帧率）
    @override
    public void actionperformed(actionevent e) {
        if (isstart && isfail == false) {//如果游戏是开始状态，就让蛇动起来
            //吃食物
            if (snakex[0] == foodx && snakey[0] == foody) {
                //长度+1
                length++;
                score += 10;

                //再次让食物随机出现
                foodx = 25 + 25 * random.nextint(34);
                foody = 75 + 25 * random.nextint(24);
            }

            //身体移动
            for (int i = length - 1; i > 0; i--) {
                snakex[i] = snakex[i - 1];
                snakey[i] = snakey[i - 1];
            }

            //走向
            switch (orient) {
                case "r":
                    snakex[0] = snakex[0] + 25;
                    //边界判断
                    if (snakex[0] > 850) {
                        snakex[0] = 25;
                    }
                    break;
                case "l":
                    snakex[0] = snakex[0] - 25;
                    //边界判断
                    if (snakex[0] < 25) {
                        snakex[0] = 850;
                    }
                    break;
                case "u":
                    snakey[0] = snakey[0] - 25;
                    //边界判断
                    if (snakey[0] < 75) {
                        snakey[0] = 650;
                    }
                    break;
                case "d":
                    snakey[0] = snakey[0] + 25;
                    //边界判断
                    if (snakey[0] > 650) {
                        snakey[0] = 75;
                    }
                    break;
            }

            //失败判断，撞到自己就gg
            for (int i = 1 ; i < length; i++) {
                if (snakex[0] == snakex[i] && snakey[0] == snakey[i]){
                    isfail = true;
                }
            }

            repaint();//刷新页面
        }

        timer.start();//定时器开启
    }

    @override
    public void keytyped(keyevent e) {

    }

    @override
    public void keyreleased(keyevent e) {

    }
}

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