GUI编程基础03贪吃蛇

import javax.swing.*;//游戏的主启动类
public class StartGame {public static void main(String[] args) {JFrame jFrame = new JFrame("贪吃蛇");jFrame.setBounds(10,10,900,720);jFrame.setResizable(false);//设置窗口大小不可变jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);jFrame.add(new GamePanel());jFrame.setVisible(true);}
}

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;//游戏面板
public class GamePanel extends JPanel implements KeyListener, ActionListener {int length;//蛇的长度int[] snakeX = new int[600];//蛇的坐标Xint[] snakeY = new int[500];//蛇的坐标YString direction;//蛇头方向boolean isStart = false;//游戏是否开始Timer timer = new Timer(100, this);// 定时器//定义一个食物int foodX;int foodY;Random random = new Random();boolean isFail = false;//死亡判断int score;//积分系统//构造器public GamePanel() {init();//获取键盘的监听事件this.setFocusable(true);this.addKeyListener(this);timer.start();//启动定时器}//初始化public void init() {length = 3;snakeX[0] = 100;snakeY[0] = 100;//头部坐标snakeX[1] = 75;snakeY[1] = 100;//第一个身体坐标snakeX[2] = 50;snakeY[2] = 100;//第二个身体坐标direction = "R";//蛇头向右//食物坐标foodX = 25 + 25 * random.nextInt(34);foodY = 75 + 25 * random.nextInt(24);score = 0;//积分}//画板：画边界，画蛇//绘制面板@Overrideprotected void paintComponent(Graphics g) {super.paintComponent(g);//清屏this.setBackground(Color.WHITE);//设置背景颜色Data.header.paintIcon(this, g, 25, 11);//绘制头部的广告栏g.fillRect(25, 75, 850, 600);//绘制游戏区域//画一条静态的小蛇if (direction.equals("L")) {//蛇头(左)Data.left.paintIcon(this, g, snakeX[0], snakeY[0]);} else if (direction.equals("R")) {//蛇头(右)Data.right.paintIcon(this, g, snakeX[0], snakeY[0]);} else if (direction.equals("U")) {//蛇头(上)Data.up.paintIcon(this, g, snakeX[0], snakeY[0]);} else if (direction.equals("D")) {//蛇头(下)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]);//蛇的长度通过length控制}//画食物Data.food.paintIcon(this, g, foodX, foodY);//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("积分：" + score, 750, 50);//游戏提示：是否开始if (isStart == false) {//画一个文字g.setColor(Color.WHITE);//设置画笔颜色g.setFont(new Font("微软雅黑", Font.BOLD, 40));g.drawString("按下空格键开始游戏", 300, 300);}//失败提示if (isFail == true) {//画一个文字g.setColor(Color.RED);//设置画笔颜色g.setFont(new Font("微软雅黑", Font.BOLD, 40));g.drawString("游戏失败，按下空格键重新开始", 200, 300);}}//接收键盘的输入：监听@Overridepublic void keyPressed(KeyEvent e) {//获取键盘按下的按键int keyCode = e.getKeyCode();if (keyCode == KeyEvent.VK_SPACE) {//如果按下的是空格键if (isFail) {//游戏失败，重新开始isFail = false;init();//重新初始化} else {//暂停游戏isStart = !isStart;}repaint();//刷新界面}//键盘控制走向if (keyCode == KeyEvent.VK_LEFT) {direction = "L";//左} else if (keyCode == KeyEvent.VK_RIGHT) {direction = "R";//右} else if (keyCode == KeyEvent.VK_UP) {direction = "U";//上} else if (keyCode == KeyEvent.VK_DOWN) {direction = "D";//下}}//定时器，监听时间：帧@Overridepublic void actionPerformed(ActionEvent e) {//如果游戏处于开始状态，并且游戏没有结束if (isStart && isFail == false) {//身体移动for (int i = length - 1; i > 0; i--) {snakeX[i] = snakeX[i - 1];snakeY[i] = snakeY[i - 1];}//通过控制方向让头部移动if (direction.equals("R")) {//右移snakeX[0] = snakeX[0] + 25;//边界判断if (snakeX[0] > 850) {snakeX[0] = 25;}} else if (direction.equals("L")) {//左移snakeX[0] = snakeX[0] - 25;//边界判断if (snakeX[0] < 25) {snakeX[0] = 850;}} else if (direction.equals("U")) {//上移snakeY[0] = snakeY[0] - 25;//边界判断if (snakeY[0] < 75) {snakeY[0] = 650;}} else if (direction.equals("D")) {//下移snakeY[0] = snakeY[0] + 25;//边界判断if (snakeY[0] > 650) {snakeY[0] = 75;}}//如果蛇头和食物重合(吃到食物)if (snakeX[0] == foodX && snakeY[0] == foodY) {length++;//长度+1score = score + 10;//吃到食物+10//重新生成食物坐标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;}}repaint();//刷新界面}timer.start();//定时器启动}@Overridepublic void keyTyped(KeyEvent e) {}@Overridepublic void keyReleased(KeyEvent e) {}
}

import javax.swing.*;
import java.net.URL;//数据类
public class Data {//头部图片public static URL headerurl = Data.class.getResource("header.png");public static ImageIcon header = new ImageIcon(headerurl);// 贪吃蛇头部public static URL upurl = Data.class.getResource("up.png");public static URL downurl = Data.class.getResource("down.png");public static URL lefturl = Data.class.getResource("left.png");public static URL righturl = Data.class.getResource("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);//贪吃蛇身体public static URL bodyurl = Data.class.getResource("body.png");public static ImageIcon body = new ImageIcon(bodyurl);//食物public static URL foodurl = Data.class.getResource("food.png");public static ImageIcon food = new ImageIcon(foodurl);
}