自己写的贪吃蛇 关于吃食物和食物坐标的问题

[ljh849893248]

package view;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.LinkedList;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class SnakeGameView extends JPanel {
	//初始化
	public static JFrame Frame = new JFrame("贪吃蛇");
	
	
	
	static int Defen= 0;
	static int Bushu= 0;

	
	public static final int width=40;
	
	public static final int high=30;
	
	public static final int cellwidth=20;
	
	public static final int cellhigh=20;
	
	public static boolean[][] map = new boolean[high][width];//地图初始化
	
	LinkedList<Point> snake = new LinkedList<Point>();//初始化集合
	
	Point food;//食物的坐标保存在FOOD里
	
	public static final int UP = 1;
	public static final int DOWN = -1;
	public static final int LEFT = 2;
	public static final int RIGHT = -2;
	
	int Nowdirector = -2 ;//默认向右走
	public void move(){
		Point head = snake.getFirst();
//		snake.addFirst(new Point(head.x,head.y-1));
//		snake.removeLast();
		switch (Nowdirector) {
		case UP:
			snake.addFirst(new Point(head.x,head.y-1));
			System.out.println("头："+head.x+"，"+head.y+"  食："+food.x+"，"+food.y);

			break;
		case DOWN:
			snake.addFirst(new Point(head.x,head.y+1));
			System.out.println("头："+head.x+"，"+head.y+"  食："+food.x+"，"+food.y);
			break;
		case RIGHT:
			snake.addFirst(new Point(head.x+1,head.y));
			System.out.println("头："+head.x+"，"+head.y+"  食："+food.x+"，"+food.y);

			break;
		case LEFT:
			snake.addFirst(new Point(head.x-1,head.y));
			System.out.println("头："+head.x+"，"+head.y+"  食："+food.x+"，"+food.y);

			break;
			
		default:
			break;			
		}
		if(eat()==1)
		{
			CreateFood();
			Defen=Defen+10;
			Frame.setTitle("当前分数: "+Defen);
		}
		else{
		snake.removeLast();}
		if(head.x==38 || head.x==1 || head.y==1 || head.y==18){
			JOptionPane.showMessageDialog(null, "撞到墙了", "撞到墙了", JOptionPane.ERROR_MESSAGE); 
			System.exit(0);
			
		}
	}
	public void Change(int Indirector){
		if(Indirector+Nowdirector!=0)
			this.Nowdirector=Indirector;//为了判断方向	
		Bushu++;
	}

public int eat(){
	Point head = snake.getFirst();
	if(head.x==food.x && head.y == food.y)
	{
		return 1;
	}
	return 2;
	
}	
	public void initmap(){// 地图初始化--添加
		for(int i=0;i<map.length;i++){
			for (int j = 0; j < map[i].length; j++) {
				if(i==0 || i==(high-1) || j==0 || j==(width-1)){
				map[i][j]=true;				
				}		
			}
		}
	}
	
	
	public void initsnake(){//初始化蛇
		int x = width/2;
		int y = high/2;
		snake.addFirst(new Point(x-1,y));
		snake.addFirst(new Point(x,y));
		snake.addFirst(new Point(x+1, y));//初始化成功
	}
	
	public void CreateFood(){ //创建食物
		Random random = new Random();
		while (true){
		int x = random.nextInt(width);
		int y = random.nextInt(high);
		if(map[y][x]){

		}else{
			food = new Point(x,y);
			break;
		}
		}
	}
	
	@Override
	public void paint(Graphics g) {
			for(int i=0;i<map.length;i++){
				for (int j = 0; j < map[i].length; j++) {
					if(map[i][j]){
						g.setColor(Color.GRAY);
						//g.fill3DRect(x, y, i, height, raised)
					}
					else{
						g.setColor(Color.WHITE);
					}
						g.fill3DRect(j*cellwidth, i*cellhigh, cellwidth, cellhigh, true);
					}
				}	
			Point head = snake.getFirst();
			g.setColor(Color.RED);
			g.fill3DRect(head.x*cellwidth, head.y*high, cellwidth, cellhigh, true);
			g.setColor(Color.GREEN);
			for (int i = 1; i < snake.size(); i++) {
				Point body = snake.get(i);
				g.fill3DRect(body.x*cellwidth, body.y*high, cellwidth, cellhigh, true);
				}
			
			g.setColor(Color.BLACK);
			g.fill3DRect(food.x*cellwidth, food.y*cellhigh, cellwidth, cellhigh, true);
		}
	
	public static void main(String[] args) {
		
		
		final JLabel labelBS = new JLabel("当前步数："+Defen);
		final JLabel labelFS = new JLabel("当前分数："+Defen);
		labelBS.setBounds(10,570, 100, 100);
		labelFS.setBounds(300,570, 100, 100);
		Frame.add(labelBS);
		Frame.add(labelFS);

		final SnakeGameView View = new SnakeGameView();
		View.initmap();
		View.initsnake();
		View.CreateFood();
		Frame.add(View);
		Frame.setSize(width*cellwidth+20,high*cellhigh+80);
		Frame.setVisible(true);
		Frame.addKeyListener(new KeyAdapter() {

			@Override
			public void keyPressed(KeyEvent e) {
				int code = e.getKeyCode();
				switch (code) {
				
				case KeyEvent.VK_UP:
					View.Change(UP);
					labelBS.setText("当前步数："+Bushu);
					break;
				case KeyEvent.VK_DOWN:
					View.Change(DOWN);
					labelBS.setText("当前步数："+Bushu);
					break;
				case KeyEvent.VK_LEFT:
					View.Change(LEFT);
					labelBS.setText("当前步数："+Bushu);
					break;
				case KeyEvent.VK_RIGHT:
					View.Change(RIGHT);
					labelBS.setText("当前步数："+Bushu);
					break;
				}
				View.move();
				View.repaint();
			}
			
		});/*


	}
	
}

代码如上

吃食物的时候偶尔会变长偶尔不会

我试着输出了食物的坐标和蛇头的坐标

发现舌头在转弯的第一下坐标不会变

不知道是哪里出了问题

代码拿上来 麻烦各位大神帮忙看一下吧 拜托了

[bree06]

paint方法的152, 156行的head.y*high和body.y*high改为body.y*cellhigh和body.y*cellhigh. 另外撞墙的判断if(head.x==38 || head.x==1 || head.y==1 || head.y==18)也有问题, 改为if (head.x > width-2 || head.x < 1 || head.y < 1 || head.y > high-2) 另外CreateFood方法要判断坐标是否在蛇的身上. 也就是要遍历snake然后判断随机的坐标是否在snake上