Java:

Product.java

/** * Models a Product that can increase and decrease in price */ public class Product { private double price; private String description; /** * Constructs a Product with a price and a description * @param thePrice the price of this Product * @param theDescription - the description of this product */ public Product(String theDescription, double thePrice) { price = thePrice; description = theDescription; } /** * Gets the price * @return the price of this Product object */ public double getPrice() { return price; } /** * Gets the description * @return the description of the Product object */ public String getDescription() { return description; } /** * Reduces the price of this product by the give percentage * @param percent the percentage to reduce the priice by */ public void reducePrice(double percent) { double reduction = price * percent / 100; price = price - reduction; } /** * Increases the price by the given percent * @param percent the percent to increase the price by */ public void increasePrice(double percent) { double increase = price * percent / 100; price = price + increase; } }