Java基于GUI编程写的贪吃蛇（附源文件下载地址）
贪吃蛇
成品展示
帧，如果事件片足够小，就是动画，1秒30帧 60帧。 连起来是动画，拆开就是静态的图片！
- 键盘监听
- 定时器 Timer
步骤:
- 定义数据类型
- 画上去图案
- 监听事件
- 鼠标
- 键盘
StartGame:
package com.yanxun.game;
import javax.swing.*;
public class StartGame {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setBounds(10, 10, 900, 720);
frame.setResizable(false);//窗口不可变
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//正常的游戏界面都是在面板上！
frame.add(new GamePanel());
frame.setVisible(true);
}
}
Data.Java:
package com.yanxun.game;
import javax.swing.*;
import java.net.URL;
//数据中心
public class Data {
//相对路径
//绝对路径 / 相当于当前项目
public static URL headerURL = Data.class.getResource("statics/header.png");
public static ImageIcon header = new ImageIcon(headerURL);
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 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 URL bodyURL = Data.class.getResource("statics/body.png");
public static ImageIcon body = new ImageIcon(bodyURL);
public static URL foodURL = Data.class.getResource("statics/food.png");
public static ImageIcon food = new ImageIcon(foodURL);
}
GamePanel:
package com.yanxun.game;
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;
//游戏的面板
public class GamePanel extends JPanel implements KeyListener, ActionListener {
//定义蛇的数据结构
int length;//蛇的长度
int[] snakeX = new int[600];//蛇的X坐标
int[] snakeY = new int[500];//蛇的Y坐标
String fx;
//游戏当前的状态：开始停止
boolean isStart = false;
//定时器 以毫秒为单位
Timer timer = new Timer(100, this);//监听this这个对象，100毫秒执行一次。
//食物的坐标
int foodX;
int foodY;
Random random = new Random();
//游戏失败判断
boolean isFail = false;
//成绩
int score;
//速度
int speed;
//构造器
public GamePanel() {
init();
//获取焦点和键盘事件
this.setFocusable(true);//获取焦点事件
this.addKeyListener(this);//获得键盘监听器
this.timer.start();//游戏一开始定时器就启动
}
public void init() {
length = 3;
snakeX[0] = 100;snakeY[0] = 100;//蛇头的坐标
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
fx = "R";
//把食物随机生成
foodX = 25 + 25 * random.nextInt(34);
foodY = 75 + 25 * random.nextInt(24);
speed = 300;
score = 0;
}
//绘制面板， 我们游戏中都使用这个画笔来画
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);//去掉游戏的闪烁
//绘制静态的面板
this.setBackground(Color.WHITE);
Data.header.paintIcon(this, g, 25, 11);//头部广告栏
g.fillRect(25, 75, 850, 600);//默认的游戏界面
//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("分数 " + score, 750, 60);
//画小蛇
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]);
}
//画食物
Data.food.paintIcon(this, g, foodX, foodY);
//游戏状态
if (!isStart) {
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("失败，按下空格重新开始游戏", 300, 300);
}
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();//获得键盘按件是哪一个
if (keyCode == KeyEvent.VK_SPACE) {
if (isFail) {
//重新开始
isFail = false;
init();
}else {
isStart = !isStart;
}
repaint();
}
//小蛇移动
if (keyCode == KeyEvent.VK_UP) {
if (!fx.equals("D"))
fx = "U";
}else if (keyCode == KeyEvent.VK_DOWN) {
if (!fx.equals("U"))
fx = "D";
}else if (keyCode == KeyEvent.VK_LEFT) {
if (!fx.equals("R"))
fx = "L";
}else if (keyCode == KeyEvent.VK_RIGHT) {
if (!fx.equals("L"))
fx = "R";
}else if (keyCode == KeyEvent.VK_ESCAPE) {
System.exit(0);
}
}
@Override
public void keyReleased(KeyEvent e) {
}
//事件监听---需要通过固定的事件来刷新，1s = 10次
@Override
public void actionPerformed(ActionEvent e) {
if (isStart && !isFail) {//游戏是开始状态，就让小蛇动起来
//吃食物
if (snakeX[0] == foodX && snakeY[0] == foodY) {
length++;
score += 10;
//再次随机食物
foodX = 25 + 25 * random.nextInt(34);
foodY = 75 + 25 * random.nextInt(24);
}
//移动
for (int i = length - 1; i > 0; -- i) {//后一节移动到前一节的位子 snakeX[1] = snakeX[0]
snakeX[i] = snakeX[i - 1];
snakeY[i] = snakeY[i - 1];
}
//走向
if (fx.equals("R")) {
snakeX[0] = snakeX[0] + 25;
if (snakeX[0] > 850) {
snakeX[0] = 25;
}
}else if (fx.equals("L")) {
snakeX[0] = snakeX[0] - 25;
if (snakeX[0] < 25) {
snakeX[0] = 850;
}
}else if (fx.equals("U")) {
snakeY[0] = snakeY[0] - 25;
if (snakeY[0] < 75) {
snakeY[0] = 650;
}
}else if (fx.equals("D")) {
snakeY[0] = snakeY[0] + 25;
if (snakeY[0] > 650) {
snakeY[0] = 75;
}
}
//失败判定，撞到自己
for (int i = 1; i < length; ++ i) {
if (snakeX[i] == snakeX[0] && snakeY[i] == snakeY[0])
isFail = true;
}
//边界判断
repaint();//重新画
}
//定时器开启
}
}
源代码下载地址
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