GUI编程实战--贪吃蛇
GUI编程实战--贪吃蛇
参考：遇见狂神说
界面绘制
- 帧：如果时间片足够小，就是动画，一秒30帧。连起来是动画，拆开是静态的图片
- 键盘监听
- 定时器 Timer
package com.ssl.Snake;
import javax.swing.*;
//游戏的主启动类
public class StartGame {
public static void main(String[] args) {
JFrame frame = new JFrame("基于java-GUI的贪吃蛇小游戏");
frame.setBounds(50,50,900,800);
frame.setVisible(true);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setResizable(false); //大小不可变
//正常游戏界面都应该在面板上！
frame.add(new GamePanel());
}
}
package com.ssl.Snake;
import javax.swing.*;
import java.net.URL;
//数据中心
public class Data {
//相对定位 tx.jpg
//绝对定位 / 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 headURL = Data.class.getResource("statics/head.png");
public static ImageIcon head = new ImageIcon(headURL);
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 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 foodURL = Data.class.getResource("statics/food.png");
public static ImageIcon food = new ImageIcon(foodURL);
public static URL bodyURL = Data.class.getResource("statics/body.png");
public static ImageIcon body = new ImageIcon(bodyURL);
}
package com.ssl.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.security.Key;
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 25*25
int[] snakeY = new int[500]; //蛇的y坐标 25*25
//脑袋的初始方向
String fx;
//游戏当前状态 开始/停止
boolean isStart;
//游戏速度
int speed = 100;
//定时器
Timer timer = new Timer(speed,this); //100ms执行一次
//食物的坐标 x:25:850 y:150:725
int foodx;
int foody;
Random random = new Random();
//游戏失败
boolean isfall = false;
//成绩
int score;
//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);
}
public void init(){
//初始化长度为3
length=3;
snakeX[0]=100; snakeY[0]=200; //脑袋坐标
snakeX[1]=75; snakeY[1]=200; //第一个身体
snakeX[2]=50; snakeY[2]=200; //第二个身体
fx = "R";
isStart = false;
speed=100;
timer.start();//定时器
//把食物随机放上
foodx = 25 + 25 * random.nextInt(34);
foody = 150 +25 * random.nextInt(24);
score = 0;
}
//绘制面板，游戏中所用东西都用这个画笔来画。
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g); //清屏，不用会闪烁
//绘制静态的面板
this.setBackground(Color.WHITE);
Data.head.paintIcon(this,g,0,0); //广告栏
g.fillRect(25,150,850,600);//默认的游戏界面
//画积分
g.setColor(Color.BLACK);
//设置字体
g.setFont(new Font("微软雅黑",Font.BOLD,20));
//放入字
g.drawString("长度："+length,750,50);
g.drawString("得分："+score,750,100);
//画食物
Data.food.paintIcon(this,g,foodx,foody);
//把小蛇画上去
//头 需要通过方向来判断
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]);
}
//身体
for(int i=1;i<length;i++){
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
}
//游戏状态
if(!isStart){
g.setColor(Color.WHITE);
//设置字体
g.setFont(new Font("微软雅黑",Font.BOLD,40));
//放入字
g.drawString("按下空格开始游戏",300,400);
}
//如果游戏失败
if(isfall){
g.setColor(Color.RED);
//设置字体
g.setFont(new Font("微软雅黑",Font.BOLD,40));
//放入字
g.drawString("游戏失败，按下空格重新开始",150,400);
}
}
@Override
public void keyTyped(KeyEvent e) {
}
//键盘的监听事件
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode(); //获得键盘的按键
if(keyCode == KeyEvent.VK_SPACE){ //如果按下的是空格键
if(isfall){
//重新开始
isfall = false;
init();
}else{
isStart = !isStart;
}
repaint();
}
//小蛇移动
if(keyCode == KeyEvent.VK_UP && (fx.equals("R")||fx.equals("L")) ){
fx="U";
}else if(keyCode == KeyEvent.VK_DOWN && (fx.equals("R")||fx.equals("L"))){
fx="D";
}else if(keyCode == KeyEvent.VK_LEFT && (fx.equals("U")||fx.equals("D")) ){
fx="L";
}else if(keyCode == KeyEvent.VK_RIGHT && (fx.equals("U")||fx.equals("D"))){
fx="R";
}
}
@Override
public void keyReleased(KeyEvent e) {
}
//事件监听 通过固定的事件刷新 1s 10次
@Override
public void actionPerformed(ActionEvent e) {
//如果游戏是开始状态，就让小蛇动起来
if(isStart && isfall == false){
//吃食物
if(snakeX[0]==foodx && snakeY[0]==foody){
length++;
foodx = 25 + 25 * random.nextInt(34);
foody = 150 +25 * random.nextInt(24);
//变速
speed= speed - 1;
score+=10;
}
//身体的移动 后一节变到前一节
for(int i=length -1;i>0;i--){
snakeX[i]=snakeX[i-1];
snakeY[i]=snakeY[i-1];
}
//右移
if(fx.equals("R")){
snakeX[0]=snakeX[0]+25;
}else if(fx.equals("L")){
snakeX[0]=snakeX[0]-25;
}else if(fx.equals("U")){
snakeY[0]=snakeY[0]-25;
}else if(fx.equals("D")){
snakeY[0]=snakeY[0]+25;
}
//边界判断
if(snakeX[0]>850){
snakeX[0]=25;
}
if(snakeX[0]<25){
snakeX[0]=850;
}
if(snakeY[0]>725){
snakeY[0]=150;
}
if(snakeY[0]<150){
snakeY[0]=725;
}
//失败判定，撞到自己就算失败
for(int i=1;i<length;i++){
if(snakeX[0]==snakeX[i]&&snakeY[0]==snakeY[i])
isfall=true;
}
repaint();
}
if(speed<50){
speed=50;
}
timer.start();//定时器
}
}
浙公网安备 33010602011771号