public void add(){       //상품추가 

Scanner s = new Scanner(System.in);

System.out.println("원하는 상품번호를 입력하세요");

int goodsNumber=s.nextInt();

System.out.println("원하는 수량을 입력하세요");

int ea = s.nextInt();

Cart c = new Cart((Goods)GoodsManager.goods.get(goodsNumber), ea);

Customer customer=(Customer)CustomerManager.user.get(LoginManager.logging.get("id"));

customer.getCart().put((Goods)GoodsManager.goods.get(goodsNumber), c);