Class User

InventorySystem.java:94–106

}

class User {
    public void addProduct(){
        InventorySystem.addProduct(new Product("", 0d,"",0,Size.L));
    }

    public void executeOrder(Order order){
        for(Map.Entry<Product, Integer> item: order.productCount.entrySet()) {
            for (int i = 0; i < item.getValue(); i++) {
                InventorySystem.removeUnit(item.getKey());
            }
        }
    }
}

class Order {
    Map<Product, Integer> productCount = new HashMap<>();