package com.springmvc.domain;

import java.util.HashMap;
import java.util.Map;

public class Cart {
    private String cartId;                   // 장바구니 ID
    private Map<String, CartItem> cartItems; // 장바구니 항목
    private int grandTotal;                  // 총액

➊

    public Cart() {
        cartItems = new HashMap<String, CartItem>();
        grandTotal = 0;
    }

➋

    public Cart(String cartId) {
        this();
        this.cartId = cartId;
    }