贪吃蛇游戏
贪吃蛇
帧，如果时间片足够小，就是动画，一秒30帧 60帧。连起来就是动画，拆开就是静态的图片。
键盘监听
定时器Timer
package com.kuang.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;
import static sun.plugin.security.JDK11ClassFileTransformer.init;
//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25*25
int[] snakeY = new int[500];//蛇的y坐标25*25
String fx ;//初始方向向右
//食物的坐标
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 isFaill = false;//游戏失败状态
//定时器 以ms为单位 1000ms = 1s
Timer timer = new Timer(100,this);//100ms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();//游戏一开始定时器就启动
}
//初始方向
public void init(){
length = 3;
snakeX[0] = 100;snakeY[0] =100;//脑袋的坐标
snakeX[1] = 75;snakeY[1] =100;//第一个身体的坐标
snakeX[2] = 50;snakeY[2] =100;//第二个身体的坐标
fx = "R";//初始方向向右
//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;
}
//绘制画板，我们游戏中的所有东西，都是要用这个画笔来画
@Override
protected void paintComponent(Graphics g){
super.paintComponent(g);//清屏
//绘制静态面板
this.setBackground(Color.WHITE);
Date.header.paintIcon(this,g,25,11);//头部广告栏画上去
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
Date.food.paintIcon(this,g,foodx,foody);
//把小蛇画上去
if(fx.equals("R")){
Date.right.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化方向向右，需要通过方向来判定
}else if (fx.equals("L")){
Date.left.paintIcon(this,g,snakeX[0],snakeY[0]);
}else if (fx.equals("U")){
Date.up.paintIcon(this,g,snakeX[0],snakeY[0]);
}else if(fx.equals("D")){
Date.down.paintIcon(this,g,snakeX[0],snakeY[0]);
}
for(int i = 1; i <length; i++){
Date.body.paintIcon(this,g,snakeX[i],snakeY[i]);//蛇的第一个身体
}
//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 (isFaill){
g.setColor(Color.RED);
g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
g.drawString("失败，按下空格重新开始游戏",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，就开始动或者停止所有是取反操作
if (isFaill){
//重新开始
isFaill = 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";
}
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
}
//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 && isFaill==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--){
//后一节移到前一节的位置 snakeX[1] = snakeX[0]
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;}//边界判断
}else if(fx.equals("U")) {
snakeY[0] = snakeY[0] - 25;
if (snakeY[0] < 75) {
snakeY[0] = 650;
}//边界判断
} else if(fx.equals("D")){
snakeY[0] = snakeY[0] + 25;
if (snakeY[0] > 650){
snakeY[0] = 75;
}//边界判断
}
//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]){
isFaill = true;
}
}
repaint();//重画页面
}
timer.start();//定时器开启
}
}
package com.kuang.snake;
import javax.swing.*;
import java.net.URL;
//数据中心
public class Date {
public static URL headerURL = Date.class.getResource("static/header.png");
public static ImageIcon header = new ImageIcon(headerURL);
public static URL upURL = Date.class.getResource("static/up.png");
public static URL downURL = Date.class.getResource("static/down.png");
public static URL leftURL = Date.class.getResource("static/left.png");
public static URL rightURL = Date.class.getResource("static/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 = Date.class.getResource("static/body.png");
public static ImageIcon body = new ImageIcon(bodyURL);
public static URL foodURL = Date.class.getResource("static/food.png");
public static ImageIcon food = new ImageIcon(foodURL);
}
package com.kuang.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);
//正常游戏界面都应该在面上
frame.add(new GamePanel());
frame.setVisible(true);
}
}
1.定义数据
2.画上去
3.监听事件
键盘
事件