ZCW-MesoLabs-Inheritance-ProductManager-BlueJ/Inventory.java

import java.util.*;

public class Inventory{
    private List<Product> products;
    
    public Inventory(){
        products = new ArrayList();
    }
    
    public void add(Product product){
        products.add(product);
    }
    
    public List<Product> getProducts(){
    
    return products;
    }
    
    public int getTotalQuantity(){
        int total = 0;
        for(Product p : products){
            total = total + p.getQuantityOfItem();
        }
        return total;
    }
}