贪吃蛇
待优化
- 资源类 获取图片
package snake01;
import javax.swing.*;
import java.net.URL;
public class Data {
//获取图片
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 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);
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);
}
- 画笔类（用来监听事件和绘画界面）
package snake01;
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;
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;//初始方向
int foodx;
int foody;
Random random=new Random();
//游戏成绩
int score;
//游戏当前状态：开始，终止
boolean isStart =false;//默认终止
boolean isFail=false;//游戏失败状态
//定时器
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();
}
//初始化方法
public void init(){
length=3;
snakeX[0]= 100;snakeY[0]= 100;//头的坐标
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
foodx=25+25*random.nextInt(34);
foody=75+25*random.nextInt(24);
score=0;
}
//画笔
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);//清屏
//绘制静态面板
this.setBackground(Color.white);
Data.header.paintIcon(this,g,25,11);//头部广告栏
g.fillRect(25,70,850,600);
//画积分
g.setColor(Color.white);
g.setFont(new Font("华文行楷",Font.CENTER_BASELINE,20));//设置字体
g.drawString("长度："+length,750,35);
g.drawString("分数："+score,750,55);
Data.food.paintIcon(this,g,foodx,foody);//画食物
if(isFail){
g.setColor(Color.red);
g.setFont(new Font("华文行楷",Font.CENTER_BASELINE,40));//设置字体
g.drawString("失败，按下空格开始游戏",300,300);
}
//把小蛇画上去
for (int i = 1; i <length ; i++) {
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
}
if(fx.equals("R")) {
Data.right.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇头向右
}
else if (fx.equals("up")) {
Data.up.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇头向上
}
else if (fx.equals("down")) {
Data.down.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇头向下
}
else if (fx.equals("left")) {
Data.left.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇头向左
}
//游戏状态
if(isStart==false){
g.setColor(Color.blue);
g.setFont(new Font("华文行楷",Font.CENTER_BASELINE,40));//设置字体
g.drawString("按下空格开始游戏",300,300);
}
}
//键盘监听事件
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();
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){
fx="up";
}
else if(keyCode==KeyEvent.VK_DOWN){
fx="down";
}
else if(keyCode==KeyEvent.VK_LEFT){
fx="left";
}
else if(keyCode==KeyEvent.VK_RIGHT){
fx="R";
}
}
//事件监听---需要通过固定事件来刷新，一秒10次
@Override
public void actionPerformed(ActionEvent e) {
if(isStart && isFail==false){
//如果游戏开始让小蛇动
//吃食物
if(snakeX[0]==foodx&&snakeY[0]==foody){
score=score+10;
length++;
//再次随机食物
foodx=25+25*random.nextInt(34);
foody=75+25*random.nextInt(24);
}
//身体
for (int i = length-1; i >0; i--) {
snakeX[i]=snakeX[i-1];
snakeY[i]=snakeY[i-1];
}
//头走向//边界判断
if(fx.equals("R")){
snakeX[0]=snakeX[0]+25;
if(snakeX[0]>850){
snakeX[0]=25;
}}
else if(fx.equals("left")){
snakeX[0]=snakeX[0]-25;
if(snakeX[0]<25){
snakeX[0]=850;
}}
else if(fx.equals("up")){
snakeY[0]=snakeY[0]-25;
if(snakeY[0]<75){
snakeY[0]=650;
}}
else if(fx.equals("down")){
snakeY[0]=snakeY[0]+25;
if(snakeY[0]>650){
snakeY[0]=75;
}}
//失败判断，撞到自己
for (int i = 1; i <length ; i++) {
if(snakeX[0]==snakeX[i]&&snakeY[0]==snakeY[i]){
isFail=true;
}
}
repaint();
}
timer.start();
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
}
}
- 主线程类（写项目时推荐尽量用一个主线程类）
package snake01;
import javax.swing.*;
public class StartGame {
public static void main(String[] args) {
JFrame frame = new JFrame("贪吃蛇");
frame.setBounds(10,10,900,720);
frame.setResizable(false);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(new GamePanel());
frame.setVisible(true);
}
}
写小游戏的顺序：定义数据；画上去；监听事件（游戏监听；键盘监听）；
（基本都是这样 *）