Java的GUI编程---贪吃蛇游戏实现

package com.akita.snake;

import javax.swing.*;

public class StartGames {
    public static void main(String[] args) {
        //绘制静态窗口
        Jframe jframe = new Jframe("快乐的贪吃蛇");
        //设置界面大小
        jframe.setBounds(250, 150, 900, 720);
        jframe.setResizable(false);    //设置窗口大小不可以关闭
        jframe.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);   //设置关闭事件，可以点击关闭

        jframe.setVisible(true);    //设置窗口可见
    }
}

package com.akita.snake;

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

public class Data {
    //头部的图片  URL：定位图片的地址  ImageIcon：图片
    public static URL headerURL = Data.class.getResource("/statics/header.png");
    public static ImageIcon header = new ImageIcon(headerURL);

    //方向
    public static URL upURL = Data.class.getResource("/statics/up.png");
    public static ImageIcon up = new ImageIcon(upURL);
    public static URL downURL = Data.class.getResource("/statics/down.png");
    public static ImageIcon down = new ImageIcon(downURL);
    public static URL leftURL = Data.class.getResource("/statics/left.png");
    public static ImageIcon left = new ImageIcon(leftURL);
    public static URL rightURL = Data.class.getResource("/statics/right.png");
    public static ImageIcon right = new ImageIcon(rightURL);

    //身体
    public static URL bodyUrl = Data.class.getResource("/statics/body.png");
    public static ImageIcon body = new ImageIcon(bodyUrl);

    //食物
    public static URL foodURL = Data.class.getResource("/statics/food.png");
    public static ImageIcon food = new ImageIcon(foodURL);
}

定义一个面板

package com.akita.snake;

import javax.swing.*;
import java.awt.*;

public class GamePanel extends JPanel {

    //画板：画界面，画蛇
    //Graphics:画笔
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);    //清屏
        this.setBackground(Color.WHITE);

        //绘制头部广告栏
        Data.header.paintIcon(this, g, 25, 11);

        //绘制游戏区域
        g.fillRect(25, 75, 850, 600);
    }
}

将上述的面板添加到主窗口

jframe.add(new GamePanel());

//画一条静态的小蛇
        if (fx.equals("R")) {
            Data.right.paintIcon(this, g, snakeX[0], snakeY[0]);
        } else if (fx.equals("L")) {
            Data.left.paintIcon(this, g, snakeX[0], snakeY[0]);
        } else if (fx.equals("U")) {
            Data.up.paintIcon(this, g, snakeX[0], snakeY[0]);
        } else if (fx.equals("D")) {
            Data.down.paintIcon(this, g, snakeX[0], snakeY[0]);
        }
        for (int i = 1; i < length; i++) {
            Data.body.paintIcon(this, g, snakeX[i], snakeY[i]);   //蛇的身体的绘制
        }

搭配timer类

Timer timer = new Timer(100, this);

这里使得当前类实现ActionListener接口，并重写actionPerformed方法，在此方法内部进行不断的移动刷新操作，方法内部代码如下：

//如果游戏处于开始状态
        if (isStart) {
            //右移
            for (int i = length - 1; i > 0; i--) {  //除了脑袋身体全部向前移动
                snakeX[i] = snakeX[i - 1];
                snakeY[i] = snakeY[i - 1];
            }
            snakeX[0] = snakeX[0] + 25;
            //刷新界面
            this.repaint();
        }
        timer.start();   //让时间监听器的时间动起来

//通过控制方向让头部移动
            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;
                }
            }

使用随机数生成食物的坐标

//初始化食物
        foodx = 25 + 25 * random.nextInt(34);
        foody = 75 + 25 * random.nextInt(24);

判断小蛇吃食物的逻辑

//如果蛇的头部与食物重合那么就吃到了食物
            if (snakeX[0] == foodx && snakeY[0] == foody) {
                //长度加一
                length++;
                //重新生成食物
                foodx = 25 + 25 * random.nextInt(34);
                foody = 75 + 25 * random.nextInt(24);
            }

//结束判断
            for (int i = 1; i < length; i++) {
                if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]) {
                    isFail = true;
                }
            }