GUI JAVA 制作的贪吃蛇小游戏
4. 贪吃蛇小游戏
帧，如果时间片足够小，就是动画，一秒30帧，60帧。
每一帧连起来就是动画，拆开就是静态的图片。
键盘监听
定时器 Timer
statics文件夹存放需要的各种图片
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定义数据
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画上去
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监听事件
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键盘监听
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事件监听
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StartGame.java
package com.GGp.snakegame;
import javax.swing.*;
public class StartGame {
public static void main(String[] args) {
JFrame jFrame = new JFrame();
//正常游戏界面都应该在面板上
jFrame.add(new GamePanel());
jFrame.setVisible(true);
jFrame.setBounds(100,100,950,800);
jFrame.setResizable(false);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
}
GamePanel.java
package com.GGp.snakegame;
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 {
int length;
int[] snakeX = new int[936];
int[] snakeY = new int[936];
String direction;//方向
int score;
//食物的坐标
int foodX;
int foodY;
Random random = new Random();
//游戏当前状态 开始，停止
boolean isStart;
//游戏输赢判断
boolean isFail;
//定时器
Timer timer = new Timer(100,this);//监听这个，100毫秒刷新一次
//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);
timer.start();//游戏一开始定时器就启动
}
//初始化
public void init(){
length = 3;
snakeX[0] = 150;snakeY[0] = 200;//脑袋的坐标
snakeX[1] = 125;snakeY[1] = 200;//第一个身体的坐标
snakeX[2] = 100;snakeY[2] = 200;//第二个身体的坐标
direction = "right";//初始方向向右
isStart = false;//默认是停止
isFail = true;
score = 0;
foodX = 25 + 25*random.nextInt(36);//范围
foodY = 100 + 25*random.nextInt(26);//范围
}
//绘制面板，游戏中的所有东西，只使用这个画笔来画
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);//附带清屏作用
//绘制静态的面板
Data.header.paintIcon(this,g,25,20);//头部
g.fillRect(25,100,900,650);//默认游戏界面
//画分数
g.setColor(Color.white);
g.setFont(new Font("华文彩云",Font.BOLD,20));
g.drawString("分数：" + score,250,60);
//食物画上去
Data.food.paintIcon(this,g,foodX,foodY);
//小蛇画上去
if(direction == "right") {
Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向右
}else if(direction == "left") {
Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);
}else if(direction == "up") {
Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);//
}else if(direction == "down") {
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]);
}
//游戏初始状态
if(isStart == false){
g.setColor(Color.white);
g.setFont(new Font("华文彩云",Font.BOLD,40));
g.drawString("按下空格开始游戏！",300,400);
}
//游戏输赢状态
if(isFail == false){
g.setColor(Color.white);
g.setFont(new Font("华文彩云",Font.BOLD,40));
g.drawString("游戏失败，空格重新开始！",300,400);
}
this.setBackground(Color.white);
}
//键盘监听
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();//获得键盘按键
if(keyCode == KeyEvent.VK_SPACE){
if(isFail == false){
//重新开始
init();
}else {
isStart = !isStart;//取反
}
repaint();
}
//小蛇移动
if(keyCode == KeyEvent.VK_UP){
direction = "up";
}else if(keyCode == KeyEvent.VK_DOWN){
direction = "down";
}else if(keyCode == KeyEvent.VK_RIGHT){
direction = "right";
}else if(keyCode == KeyEvent.VK_LEFT){
direction = "left";
}
}
//定时器，事件监听---需要固定事件来刷新，1s = 10次
@Override
public void actionPerformed(ActionEvent e) {
if(isStart && isFail == true){
//如果游戏是开始状态，就让小蛇动起来
for (int i = length-1; i > 0 ; i--) {//后一节移到前一节的位置
snakeX[i] = snakeX[i-1];
snakeY[i] = snakeY[i-1];
}
//走向判断，边界判断
//向右
if(direction == "right"){
if(snakeX[0] > 875){
snakeX[0] = 0;
}
snakeX[0] = snakeX[0] + 25;
}else if(direction == "left"){//向左
if(snakeX[0] < 50){
snakeX[0] = 925;
}
snakeX[0] = snakeX[0] - 25;
}else if(direction == "down"){//向下
if(snakeY[0]>700){
snakeY[0] = 75;
}
snakeY[0] = snakeY[0] + 25;
}else if(direction == "up"){//向上
if(snakeY[0] < 125){
snakeY[0] = 750;
}
snakeY[0] = snakeY[0] - 25;
}
//吃食物
if(snakeX[0] == foodX && snakeY[0] == foodY){
length++;
score += 1;
//再次生成食物
foodX = 25 + 25*random.nextInt(36);//范围
foodY = 100 + 25*random.nextInt(26);//范围
}
//判定输赢
//游戏输赢判断
for (int i = 1; i < length; i++) {
if(snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){
isFail = false;
}
}
repaint();//重新绘画
}
timer.start();//定时器开启
}
@Override
public void keyReleased(KeyEvent e) { }
@Override
public void keyTyped(KeyEvent e) { }
}
Data.java
package com.GGp.snakegame;
import javax.swing.*;
import java.net.URL;
public class Data {
//相对路径 tx.jpg
// 绝对路径 / 相对于当前项目
public static URL headerURL = Data.class.getResource("statics/header.jpg");
public static ImageIcon header = new ImageIcon(headerURL);
public static URL bodyURL = Data.class.getResource("statics/body.jpg");
public static ImageIcon body = new ImageIcon(bodyURL);
public static URL foodURL = Data.class.getResource("statics/food.jpg");
public static ImageIcon food = new ImageIcon(foodURL);
public static URL upURL = Data.class.getResource("statics/up.jpg");
public static ImageIcon up = new ImageIcon(upURL);
public static URL downURL = Data.class.getResource("statics/down.jpg");
public static ImageIcon down = new ImageIcon(downURL);
public static URL rightURL = Data.class.getResource("statics/right.jpg");
public static ImageIcon right = new ImageIcon(rightURL);
public static URL leftURL = Data.class.getResource("statics/left.jpg");
public static ImageIcon left = new ImageIcon(leftURL);
}