package?firstBag;

import?java.awt.Color;
import?java.awt.Graphics;
import?java.awt.Point;
import?java.util.HashSet;
import?java.util.linkedList;
import?java.util.Set;

import?ListenerBag.Listener;
import?ToolsBag.tools;

public?class?Snack?{
	
	public?static??final?int?UP=-1;
	public?static??final?int?DOWN=1;
	public?static??final?int?LEFT=2;
	public?static??final?int?RIGHT=-2;
	private?int?oldDirectionnewDirection;
	private?Point?tail;
	private?boolean?life;
	private?linkedList?body=new?linkedList（）;
	private?Set?listeners?=?new?HashSet（）;?//注冊多個事件監聽器
	public?Snack（）{?????????????????????????????????//實現蛇的初始化
		init（）;???????????????????????????//初始化方法
	}
	public?void?init（）{
		int?x=tools.WIDTH/2;
		int?y=tools.HEIGHT/2;