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

/**
 * Created by leon on 1/10/18.
 */
public class Product {

    private double price;
    private int quantity;
    private String id;

    public Product(String id, double price, int quantity) {
        this.id = id;
        this.price = price;
        this.quantity = quantity;
    }

    public String getId() {
        return this.id;
    }

    public double getPrice() {
        return this.price;
    }

    public void changePrice(double newPrice) {
        price = newPrice;
    }

    public int getQuantity() {
        return this.quantity;
    }

    public void changeQuantity(int amount) {
        if (amount >= 0) {
            this.quantity += amount;
        } else {
            this.quantity -= amount;   
        }
    }
}