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

public class Product {
    int quantity;
    String id;
    double price;

    public Product(){
        quantity = -1;
        id = null;
        price = -1;
    }

    public int getQuantity(){
        return quantity;
    }

    public void setQuantity(int number){
        this.quantity = quantity+number;
    }

    public String getId(){
        return id;
    }

    public void setId(){
        this.id = id;
    }

    public double getPrice(){
        return price;
    }

    public void setPrice(){
        this.price = price;
    }

}