Method getItem

StateDesignPattern/Inventory.java:45–58

(int codeNumber)

    }

    public Item getItem(int codeNumber) throws Exception {

        for (ItemShelf itemShelf : itemShelves) {
            if (itemShelf.code == codeNumber) {
                if (itemShelf.isSoldOut()) {
                    throw new Exception("item already sold out");
                } else {

                    return itemShelf.item;
                }
            }
        }
        throw new Exception("Invalid Code");
    }

    public void updateSoldOutItem(int codeNumber){
        for (ItemShelf itemShelf : itemShelves) {