GUI编写贪吃蛇小游戏

GUI编写贪吃蛇小游戏

1.游戏主启动类

public class StartGame  {
    public static void main(String[] args) {
        JFrame frame=new JFrame();
        frame.setBounds(10,10,900,720);
        frame.setResizable(false);//设置窗口大小不可变
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //加入正常游戏界面面板
        frame.add(new GamePanel());
        //设置窗口可变
        frame.setVisible(true);
    }
}

2.游戏面板类

package com.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;

//2游戏面板
public class GamePanel extends JPanel implements KeyListener , ActionListener {
    //使用画笔绘制面板
    int lenght;//蛇的长度
    int[] snakeX=new int[600];//蛇的x坐标
    int[] snakeY=new int[600];//蛇的y坐标
    String direction;//方向
    boolean isStart=false;//默认暂停状态
    boolean isfail=false;//判断游戏是否失败
    int score;//记录分数
    //定时器
    Timer timer=new Timer(100,this);//100毫秒执行一次
    //食物坐标
    int foolx;
    int fooly;
    Random random=new Random();
    //构造器
    public GamePanel(){
        init();
        this.setFocusable(true);//获得焦点事件
        this.addKeyListener(this);//获得键盘监听
        timer.start();
    }
    
    //初始化小蛇
    public void init(){
        lenght=3;//初始长度为3
        snakeX[0]=100;snakeY[0]=100;//头部位置
        snakeX[1]=75;snakeY[1]=100;//第一个身体
        snakeX[2]=50;snakeY[2]=100;//第二个身体
        direction="R";//初始方向向右
        //随机分配食物
        foolx=25+25*random.nextInt(34);
        fooly=75+25*random.nextInt(24);
        score=0;

    }
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);//可清屏
        //3绘制静态面板
        this.setBackground(Color.white);
        Data.header.paintIcon(this,g,25,11);//头部广告栏
        g.fillRect(25,75,850,600);//默认游戏界面
		//判断移动方向，并根据移动方向设置小蛇头部方向
        if(direction.equals("R")){
            Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);
        }else if(direction.equals("L")){
            Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);
        }else if(direction.equals("U")){
            Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);
        }else if(direction.equals("D")){
            Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);
        }
        //根据长度设置小蛇长度
        for (int i = 1; i < lenght; i++) {
            Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
        }
       
        //积分描述
        g.setColor(Color.white);
        g.setFont(new Font("微软雅黑",Font.BOLD,13));
        g.drawString("长度 "+lenght,750,30);
        g.drawString("分数 "+score,750,47);
        //食物生成
        Data.fool.paintIcon(this,g,foolx,fooly);

        //游戏状态
        if(isStart==false){
            g.setColor(Color.white);
            g.setFont(new Font("微软雅黑",Font.BOLD,40));
            g.drawString("按下空格启动游戏",300,300);
        }
        if(isfail){
            g.setColor(Color.white);
            g.setFont(new Font("微软雅黑",Font.BOLD,40));
            g.drawString("失败 按下空格重新启动游戏",300,300);
        }
    }

    //键盘监听器
    @Override
    public void keyPressed(KeyEvent e) {
        int keycode=e.getKeyCode();//获取键盘按键
        if(keycode==KeyEvent.VK_SPACE){
            //isfail为true时，游戏失败
            if(isfail){
                //重新开始
                isfail=false;
                init();
            }else {
                isStart=!isStart;//取反
                repaint();
            }
        }
        //根据键盘键判断小蛇移动方向
        if(keycode==KeyEvent.VK_UP){
            direction="U";
        }else if(keycode==KeyEvent.VK_DOWN){
            direction="D";
        }else if(keycode==KeyEvent.VK_RIGHT){
            direction="R";
        }else if(keycode==KeyEvent.VK_LEFT){
            direction="L";
        }
    }
    //事件监听--需要通过固定时间监听
    @Override
    public void actionPerformed(ActionEvent e) {
        if(isStart&&isfail==false){
            //判断是否吃到食物，如果吃到，则长度加1，分数加10，并重新生成食物
            if(snakeX[0]==foolx && snakeY[0]==fooly){
                lenght++;//吃到食物长度加一
                score+=10;//分数加10
                foolx=25+25*random.nextInt(34);
                fooly=75+25*random.nextInt(24);
            }
            //移动
            for (int i=lenght-1;i>0;i--){//后一节覆盖前一节
                snakeX[i]=snakeX[i-1];
                snakeY[i]=snakeY[i-1];
            }
            if(direction.equals("R")){
                snakeX[0]=snakeX[0]+25;
                if(snakeX[0]>850){
                    snakeX[0]=25;
                }//边界判断
            }else if(direction.equals("L")){
                snakeX[0]=snakeX[0]-25;
                if(snakeX[0]<25){
                    snakeX[0]=850;
                }//边界判断
            }else if(direction.equals("U")){
                snakeY[0]=snakeY[0]-25;
                if(snakeY[0]<75){
                    snakeY[0]=650;
                }//边界判断
            }else if(direction.equals("D")){
                snakeY[0]=snakeY[0]+25;
                if(snakeY[0]>650){
                    snakeY[0]=75;
                }//边界判断
            }
            //判断失败
            for (int i = 1; i < lenght; 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) {}
}

3.图片资源存放

//用于存放图片等数据信息
public class Data {
	//获取图片路径
    public static URL headerURL=Data.class.getResource("static/header.png");
    public static ImageIcon header = new ImageIcon(headerURL);
	//获取图片路径
    public static URL bodyURL=Data.class.getResource("static/body.png");
    public static ImageIcon body = new ImageIcon(bodyURL);
	//获取图片路径
    public static URL upURL=Data.class.getResource("static/up.png");
    public static ImageIcon up = new ImageIcon(upURL);
	//获取图片路径
    public static URL downURL=Data.class.getResource("static/down.png");
    public static ImageIcon down = new ImageIcon(downURL);
	//获取图片路径
    public static URL rightURL=Data.class.getResource("static/right.png");
    public static ImageIcon right = new ImageIcon(rightURL);
	//获取图片路径
    public static URL leftURL=Data.class.getResource("static/left.png");
    public static ImageIcon left = new ImageIcon(leftURL);
	//获取图片路径
    public static URL foolURL=Data.class.getResource("static/fool.png");
    public static ImageIcon fool = new ImageIcon(foolURL);

}

注：本例子为视频学习笔记。
参考视频来源于https://www.bilibili.com/video/BV1DJ411B75F