java通过GUI实现贪吃蛇游戏

java 通过GUI编程实现贪吃蛇游戏

1、Home的java文件

1.1、首先建立一个Home.java文件，主要用于建立一个面板，将面板放入frame中，对面板进行一些初始化操作

1.2、代码：

import javax.swing.*;

public class Home {
     
    public static void main(String[] args) {
     
        JFrame frame = new JFrame("贪吃蛇游戏");

        GamePanel panel = new GamePanel();
        frame.add(panel);

        frame.setResizable(false);   //窗口大小不可改变
        frame.setBounds(10,10,900,720);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

2、Data的java文件

2.1、接着创建一个Data.java文件，该文件下主要是指定图片的引用地址，将图片转化为图标。

2.2、代码：

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

public class Data {
     
    //获取图片路径
    public static URL headerURL = Data.class.getResource("statics/header.png");
    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 URL bodyURL = Data.class.getResource("statics/body.png");
    public static URL foodURL = Data.class.getResource("statics/food.png");

    //将图片转为图标
    public static ImageIcon header = new ImageIcon(headerURL);
    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 ImageIcon body = new ImageIcon(bodyURL);
    public static ImageIcon food = new ImageIcon(foodURL);

}

3、GamePanel的java文件

3.1、该文件下主要是贪吃蛇的实现流程，如键盘事件的监听，通过对键盘的监听，获取用户的键盘输入，从而实现贪吃蛇的上下左右移动等等。

3.2、代码：

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;

public class GamePanel extends JPanel implements KeyListener, ActionListener {
     

    int length;   //蛇的长度
    int[] snakeX = new int[600];
    int[] snakeY = new int[500];
    String fx;
    boolean isStart = false;
    int foodX;
    int foodY;
    //失败
    boolean isFalse = false;
    int score;
    //生成随机数
    Random random = new Random();
    //定时器
    Timer timer = new Timer(100,this);

    //构造器
    public GamePanel() {
     
        init();
        //获取聚焦
        this.setFocusable(true);
        //添加键盘监听
        this.addKeyListener(this);
        timer.start();

    }



    //初始化
    public void init(){
     
        length = 3;
        snakeX[0] = 100;
        snakeY[0] = 100;
        snakeX[1] = 75;
        snakeY[1] = 100;
        snakeX[2] = 50;
        snakeY[2] = 100;
        fx = "right";
        foodX = 25+25*random.nextInt(34);
        foodY = 75+25*random.nextInt(24);
        score = 0;
    }

    //画图
    @Override
    protected void paintComponent(Graphics g) {
     
        super.paintComponent(g);    //清屏   --如果删除这行代码，程序虽然可以运行，但会闪烁
        this.setBackground(Color.white);
        Data.header.paintIcon(this,g,25,11);
        g.fillRect(25,75,850,600);  //默认的游戏界面

        //将长度和分数画上去
        g.setColor(Color.white);
        g.setFont(new Font("微软雅黑",Font.BOLD,15));  //字体样式微软雅黑，加粗，30号大小
        g.drawString("长度"+length,750,35);
        g.drawString("得分"+score,750,55);

        //将食物图标放到画板上
        Data.food.paintIcon(this,g,foodX,foodY);

        //将头放到画板上
        if(fx.equals("up")){
     
            Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);
        }else if (fx.equals("down")){
     
            Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);
        }else if (fx.equals("left")){
     
            Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);
        }else if (fx.equals("right")){
     
            Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);
        }
        //将身体图片放到画板上
        for (int i = 1; i < length; i++) {
     
            Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
        }




        if(isStart == false){
     
            g.setColor(Color.white);
            g.setFont(new Font("微软雅黑",Font.BOLD,30));  //字体样式微软雅黑，加粗，30号大小
            g.drawString("按下空格开始游戏",300,300);
        }


        if(isFalse == true){
     
            g.setColor(Color.red);
            g.setFont(new Font("微软雅黑",Font.BOLD,30));  //字体样式微软雅黑，加粗，30号大小
            g.drawString("游戏失败，按空格键重新开始",300,300);
        }

    }

    //键盘监听
    @Override
    public void keyPressed(KeyEvent e) {
     
        int keyCode = e.getKeyCode();

        if(keyCode == KeyEvent.VK_SPACE){
     
            if (isFalse){
     
                //重新开始
                isFalse = false;
                init();
            }else{
     
                isStart = !isStart;
            }
            //重新绘制
            repaint();
        }
        if(keyCode == KeyEvent.VK_UP){
     
            fx = "up";
        }
        if(keyCode == KeyEvent.VK_DOWN){
     
            fx = "down";
        }
        if(keyCode == KeyEvent.VK_LEFT){
     
            fx = "left";
        }
        if(keyCode == KeyEvent.VK_RIGHT){
     
            fx = "right";
        }
    }

    //事件监听
    @Override
    public void actionPerformed(ActionEvent e) {
     


        if(isStart  && isFalse == false){
     

            //吃食物
            if(snakeX[0] == foodX && snakeY[0] == foodY){
     
                length++;
                score = score + 10;
                //吃到后重新生成
                foodX = 25+25*random.nextInt(34);
                foodY = 75+25*random.nextInt(24);
            }

          //判断移动方向
            if (fx == "up"){
     
                //身体上移
                for (int i = length-1; i > 0; i--) {
     
                    snakeX[i] = snakeX[i-1];
                    snakeY[i] = snakeY[i-1];

                }
                //头部上移
                snakeY[0] = snakeY[0]-25;

                //当蛇走到最上边则从最下边出来
                if(snakeY[0] < 75){
     
                    snakeY[0] = 650;
                }
            }else if (fx == "down"){
     
                //身体下移
                for (int i = length-1; i > 0; i--) {
     
                    snakeX[i] = snakeX[i-1];
                    snakeY[i] = snakeY[i-1];

                }
                //头部下移
                snakeY[0] = snakeY[0]+25;

                //当蛇走到最下边则从最上边出来
                if(snakeY[0] > 650){
     
                    snakeY[0] = 75;
                }
            }else if (fx == "left"){
     
                //身体左移
                for (int i = length-1; i > 0; i--) {
     
                    snakeX[i] = snakeX[i-1];
                    snakeY[i] = snakeY[i-1];

                }
                //头部左移
                snakeX[0] = snakeX[0]-25;

                //当蛇走到最左边则从最右边出来
                if(snakeX[0] < 25){
     
                    snakeX[0] = 850;
                }
            }else if (fx == "right"){
     
                //身体右移
                for (int i = length-1; i > 0; i--) {
     
                    snakeX[i] = snakeX[i-1];
                    snakeY[i] = snakeY[i-1];

                }
                //头部右移
                snakeX[0] = snakeX[0]+25;

                //当蛇走到最右边则从最左边出来
                if(snakeX[0] > 850){
     
                    snakeX[0] = 25;
                }
            }


            //判断是否撞到身体
            for (int i = 1; i < length; i++) {
     
                if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){
     
                    isFalse = true;
                }
            }



             //重画
            repaint();
            timer.start();
        }
    }






    @Override
    public void keyTyped(KeyEvent e) {
     

    }

    @Override
    public void keyReleased(KeyEvent e) {
     

    }





}

4、贪吃蛇的图标以及实现功能的全部代码

4.1、百度网盘获取链接：链接：https://pan.baidu.com/s/1tSK3MUDpIYIF8hXhFDbKRQ
提取码：t8e9