/** 判斷List2是否屬於list1的子集
	 * @param list1
	 * @param list2
	 * @return
         * @author ferndean
	 */
	public boolean isChildList(List<LinkedList> list1,LinkedList list2)
	{
		for(int i= 0;i<list1.size();i++)
		{
			LinkedList childList = (LinkedList)list1.get(i);
			if(childList.size() == list2.size())
			{
				int tmp =0;
				for(int j=0;j<list2.size();j++)
				{
					if(childList.get(j).equals(list2.get(j)) || childList.get(j) == list2.get(j))
					{
						tmp++;
						continue;
					}else
					{
						tmp =0;
					}
				}
				if(tmp == list2.size())
				{
					return true;
				}
				else
				{
					continue;
				}
			}else
			{
				continue;
			}
		}
		return false;
	}