GUI编写贪吃蛇
Data.java
package com.kuang.snake;
import javax.swing.*;
import java.net.URL;
//数据中心
public class Date {
//相对路径 tx.jpg
//绝对路径 / 相当于当前项目
public static URL headerURL = Date.class.getResource ("statics/header.png");
public static ImageIcon header = new ImageIcon (headerURL);
public static URL upURL = Date.class.getResource ("statics/up.png");
public static URL leftURL = Date.class.getResource ("statics/left.png");
public static URL downURL = Date.class.getResource ("statics/down.png");
public static URL rightURL = Date.class.getResource ("statics/right.png");
public static ImageIcon up = new ImageIcon (upURL);
public static ImageIcon left = new ImageIcon (leftURL);
public static ImageIcon down = new ImageIcon (downURL);
public static ImageIcon right = new ImageIcon (rightURL);
public static URL bodyURL = Date.class.getResource ("statics/body.png");
public static ImageIcon body = new ImageIcon (bodyURL);
public static URL foodURL = Date.class.getResource ("statics/food.png");
public static ImageIcon food = new ImageIcon (foodURL);
}
GamePanel.java
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;
//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
//当前游戏的状态: 开始,停止!
boolean isStart = false;//默认是不开始!
boolean isFail = false;//游戏失败状态 默认不失败
//定时器 以ms为单位 1000ms=1s
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);//获取焦点事件
this.addKeyListener (this);//获得键盘监听事件
timer.start ();//游戏一开始定时器就启动
}
//初始化方法
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";//初始化方向向右
//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);
//画积分
g.setColor (Color.BLUE);
g.setFont (new Font ("微软雅黑",Font.BOLD,18));
g.drawString ("长度 "+length,750,35);
g.drawString ("分数 "+score,750,55);
//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]);//蛇头初始化向右,需要通过方向来判断
}else if (fx.equals ("L")){
Date.left.paintIcon (this,g,snakeX[0],snakeY[0]);//蛇头初始化向右,需要通过方向来判断
}else if (fx.equals ("U")){
Date.up.paintIcon (this,g,snakeX[0],snakeY[0]);//蛇头初始化向右,需要通过方向来判断
}else if (fx.equals ("D")){
Date.down.paintIcon (this,g,snakeX[0],snakeY[0]);//蛇头初始化向右,需要通过方向来判断
}
for (int i = 1; i < length; i++) {
Date.body.paintIcon (this,g,snakeX[i],snakeY[i]);//第i个身体坐标
}
//游戏状态
if (isStart==false){
g.setColor (Color.white);
g.setFont (new Font ("微软雅黑",Font.BOLD,40));
g.drawString ("按下空格键开始游戏!",300,300);
}
if (isFail){
g.setColor (Color.RED);
g.setFont (new Font ("微软雅黑",Font.BOLD,40));
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){//如果按下的事空格键
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++;
//分数+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];
snakeY[i] = snakeY[i-1];
}
//走向
if (fx.equals ("R")){
snakeX[0] = snakeX[0]+25;
//边界判断
if (snakeX[0]>850) {snakeX[0]=25;}
}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;}
}
//失败判读撞到自己就算失败(或者也可以规定撞到边界)
for (int i = 1; i < length; i++) {
if (snakeX[0]==snakeX[i]&&snakeY[0]==snakeY[i]){
isFail = true;
}
}
repaint ();//重置画面
}
timer.start ();
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
}
}
StartGame.java
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板上!
frame.add (new GamePanel ());
frame.setVisible (true);
}
}
statics
food.png
header.png
body.png
down.png
left.png
right.png
up.png