Java一个简单的贪吃蛇
作者:互联网
Java一个简单的贪吃蛇
虽然GUI已经要淘汰了,但是手动写写界面还是有助于理解语法的,像构造函数 ,函数调用,内部类,继承,接口。有助于半初学者强化理解。
直接上代码
游戏主体类:
package com.chenghu.snake;
import javax.swing.*;
public class StartGame {
public static void main(String[] args) {
JFrame frame = new JFrame(); //new一个窗体
frame.setBounds(10,10,1000,1000);//开一个窗体
frame.setResizable(false);//是否可拉伸
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); //点击×关闭
frame.add(new GamePanel());//窗体上添加一个画布
frame.setVisible(true);//窗体可见
}
}
画布类:
package com.chenghu.snake;
import com.sun.xml.internal.ws.addressing.model.ActionNotSupportedException;
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 {//画布继承两个接口 KeyListener ,ActionListener监听键盘和事件
//下面定义一些变量
int length; //蛇身长度
int[] snakeX=new int[600];//蛇的坐标
int[] snakeY=new int[600];//蛇的坐标
String fx;//蛇头方向
boolean isStart;//游戏状态
Timer timer = new Timer(100, this);//定时器,100ms刷新
int foodx;//食物坐标
int foody;//食物坐标
Random random=new Random();//食物随机 、位置
public GamePanel(){//画布构造器 就是构造方法,里面初始化一些量
init();//初始化函数 初始化蛇的位置,游戏状态,食物位置
this.setFocusable(true);
this.addKeyListener(this);
}
public void init(){
length=3;
snakeX[0]=100;snakeY[0] =250;
snakeX[1]=75;snakeY[1] =250;
snakeX[2]=50;snakeY[2] =250;
fx="R";
foodx=25+25*random.nextInt(38);
foody=150+25*random.nextInt(28);
isStart=false;
timer.start();
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);//清屏
this.setBackground(Color.white);
Data.header.paintIcon(this,g,25,11);//头部广告
g.fillRect(25,150,950,700);//游戏界面
//放小蛇
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]);
for (int i=1;i<length;i++)
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
Data.food.paintIcon(this,g,foodx,foody);
if(isStart==false){
g.setColor(Color.white);
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("按下空格开始游戏",300,400);
}
}
@Override
public void keyPressed(KeyEvent e) { //监听键盘
int keyCode=e.getKeyCode();
if(keyCode==KeyEvent.VK_SPACE) {//监听空格
isStart=!isStart;
repaint();
}
if(keyCode==KeyEvent.VK_UP){fx ="U";} //监听方向
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 actionPerformed(ActionEvent e) { //监听事件
if(isStart){
for(int i=length-1;i>0;i--){
snakeX[i]=snakeX[i-1];
snakeY[i]=snakeY[i-1];
}
if(fx.equals("R")){
snakeX[0]=snakeX[0]+25;
if(snakeX[0]>950) snakeX[0]=25;
}else if(fx.equals("L")){
snakeX[0]=snakeX[0]-25;
if(snakeX[0]<25) snakeX[0]=950;
}else if(fx.equals("U")){
snakeY[0]-=25;
if(snakeY[0]<150) snakeY[0]=825;
}else if(fx.equals("D")){
snakeY[0]+=25;
if(snakeY[0]>825) snakeY[0]=150;
}
if(snakeX[0]==foodx&&snakeY[0]==foody) {
length++;
foodx=25+25*random.nextInt(38);
foody=150+25*random.nextInt(28);
}
repaint();
}
timer.start();
}
@Override
public void keyReleased(KeyEvent e) { }
@Override
public void keyTyped(KeyEvent e) {}
}
素材类:
package com.chenghu.snake;
import javax.swing.*;
import java.net.URL;
public class Data { //这个类是定位需要的素材 图片
public static URL bodyurl=Data.class.getResource("snake/body.jpg");
public static ImageIcon body=new ImageIcon(bodyurl);
public static URL downurl=Data.class.getResource("snake/down.jpg");
public static ImageIcon down=new ImageIcon(downurl);
public static URL lefturl=Data.class.getResource("snake/left.jpg");
public static ImageIcon left=new ImageIcon(lefturl);
public static URL righturl=Data.class.getResource("snake/right.jpg");
public static ImageIcon right=new ImageIcon(righturl);
public static URL foodurl=Data.class.getResource("snake/body.jpg");
public static ImageIcon food=new ImageIcon(foodurl);
public static URL headerurl=Data.class.getResource("snake/timg.jpg");
public static ImageIcon header=new ImageIcon(headerurl);
public static URL upurl=Data.class.getResource("snake/up.jpg");
public static ImageIcon up=new ImageIcon(upurl);
}
总结一下:简单实现了贪吃蛇,总体来说,想要的功能分三步实现,第一步:定义变量初始化数据,第二步:用画笔在画布上画出来,第三步:监听这个事件,有变化更改数据。
标签:ImageIcon,Java,snakeX,贪吃蛇,static,简单,new,Data,public 来源: https://www.cnblogs.com/SStiger/p/12805684.html