public static void addItemTester(Item item){
		if(item != null){
			if(ItemStorageInventory.create().addItem(item)){
				
				System.out.println("add "+ item.toString() + " successfully\n");
			}else{
				System.out.println("add "+ item.toString() + " failed\n");
			}
		}else
			System.out.println("add item " + " failed\n");
	}