贪吃蛇
贪吃蛇
帧，如果时间片足够小，就是动画，一秒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
package com.tian.snake;
import javax.swing.*;
//游戏的主启动类
public class StartGame {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setBounds(10,10,900,720);
frame.setResizable(false);//窗口大小不可变
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//正常游戏界面应该在面板上
frame.add(new GamePanel());
frame.setVisible(true);
}
}
package com.tian.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;
//游戏面板
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;//初始方法向右
//食物坐标
int foodx;
int foody;
Random random = new Random();
int score;//成绩
//游戏当前的状态：开始，停止
boolean isStart = false;//默认是不开始
boolean isFail = false;//游戏失败状态
//定时器 以毫秒为单位
Timer timer = new Timer(100,this);//100毫秒执行一次！
//构造器
public GamePanel() {
init();
//获得焦点和键盘事件
this.setFocusable(true);//获得焦点事件
this.addKeyListener(this);//获得键盘监听事件
timer.start();//游戏一开始定时器启动
}
//初始化方法
public void init(){
length = 3;
snakeX[0] = 100;snakeY[0] = 100;//脑袋坐标
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";
//把食物随机分布在界面上
foodx=25 +25*random.nextInt(34);
foody=75 +25*random.nextInt(24);
score = 0;
}
//绘制面板，我们游戏中的所有东西，都是用这个画笔来画
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);//清屏
//绘制静态的面板
this.setBackground(Color.BLACK);
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,750,50);
//画食物
Data.food.paintIcon(this,g,foodx,foody);
//把小蛇画上去
//蛇头位置
if(fx.equals("R")){
Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向右，需要方向来判断
}else if(fx.equals("L")){
Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向左，需要方向来判断
}else if(fx.equals("U")){
Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向上，需要方向来判断
}else if(fx.equals("D")){
Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向下，需要方向来判断
}
//身体
for (int i = 1; i < length; i++) {
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);//身体
}
//游戏状态
if(isStart==false){
g.setColor(Color.white);
g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
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));//设置字体
g.drawString("失败，按下空格重新开始",300,300);
}
}
//键盘监听事件
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();//获得键盘按键是哪一个
if (keyCode == KeyEvent.VK_SPACE){//如果按下的是空格键
if(isFail){
//重新开始
isFail = false;
init();
}else {
isStart = !isStart;//取反
}
repaint();
}
//小蛇移动
if(keyCode==KeyEvent.VK_UP){
fx = "U";
}else if (keyCode==KeyEvent.VK_DOWN){
fx = "D";
}else if (keyCode==KeyEvent.VK_LEFT){
fx = "L";
}else if (keyCode==KeyEvent.VK_RIGHT){
fx = "R";
}
}
//事件监听---需要通过固定事件来刷新，1s=10次
@Override
public void actionPerformed(ActionEvent e) {
if(isStart && isFail == false){//如果游戏是开始状态，就让小蛇动起来
//吃食物
if (snakeX[0] == foodx && snakeY[0] == foody){
length++;//长度+1
//分数加10
score = 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--) {
snakeX[i] = snakeX[i-1];//向前移动一节
snakeY[i] = snakeY[i-1];
}
//走向
if (fx.equals("R")){
snakeX[0] = snakeX[0]+25;
if(snakeX[0]>850){snakeX[0] = 25;}//边界判断
}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;}
}
//失败判断，撞到自己就算失败
for (int i = 1; i < length; i++) {
if (snakeX[0]==snakeX[i]&& snakeY[0]==snakeY[i]){
isFail = true;
}
}
repaint();//重画
}
timer.start();//定时器开启
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void keyTyped(KeyEvent e) {
}
}
package com.tian.snake;
import javax.swing.*;
import java.net.URL;
//数据中心
public class Data {
//相对路径 tx.jpg
//绝对路径 /相当于当前的项目
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 ImageIcon up = new ImageIcon(upURL);
public static URL dowmURL = Data.class.getResource("statics/down.png");
public static ImageIcon down = new ImageIcon(dowmURL);
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);
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);
}
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