CISS-111 Project 4

CISS-111 Project 4

Write a Java program to demonstrate the use of inheritance and polymorphism. This program will also use the Vector class and a few enumerations.

Learning outcomes

• Working with enumerations.
• Working with inheritance and polymorphism.
• Designing subclasses.
• Overriding inherited methods.
• Confirmation program produces desired results.

public enum ConfectionType {
    FrozenYogurt, Gelato, HardPack, Sorbet;
}

public enum Flavor {
    Vanilla, Chocolate, Strawberry, CrumbsAlongTheMohawk, BlackRaspberry, CakeBatter,
    Eggnog, CottonCandy, CookieDough;
}

public enum Toppings {
    ChocolateSprinkles, HotFudge, Caramel, MarshmallowCreme
}

public enum ConeType {
    Cake, Waffle, Sugar, Pretzel, GlutenFree;
}

public interface IceCream {

    public void add(Confection c);
    public void add(Toppings t);
}

A general confection (scoop of ice cream, if you will) is comprised of a type and a flavor and is as follows. You need to create the constructor and toString() method.

Confection

This will be implemented by a single constructor that accepts both the type and flavor as parameters.

public class Confection {

    private ConfectionType type;
    private Flavor flavor;

    // ...
}

Template for the Confection class.

Next you will create classes for the types of ice cream orders you could place at an ice cream stand. Each type of order has rules about what it may contain.

Cone

public class Cone implements IceCream {

    // RULES: only one scoop and no toppings

    private ConeType type;
    private Confection content = null;

    // ...
}

Template for the Cone class.

Dish

import java.util.Vector;

public class Dish implements IceCream {

    // RULES: Up to 2 scoops and no toppings.

    protected Vector<Confection> scoops;

    // ...
}

Template for the Dish class.

Sundae

The Sundae is an extension of Dish, therefore we inherit the scoops from Dish.

import java.util.Vector;

public class Sundae extends Dish{

    // RULES: Up to 5 scoops and up to 3 toppings.

    private Vector<Toppings> toppings;

    // ...
}

Template for the Sundae class.

A main Project 4 source code is provided here to test your classes:

import java.util.Vector;

public class Project4 {

    public static int rand(int i) {
        return (int)(Math.random() * i);
    }

    public static void main(String[] args) {

        // Take note of the Vector type!
        Vector<IceCream> order = new Vector<>();
        // This is just like Coins and PaperCurrency
        ConfectionType[] types = ConfectionType.values();
        Flavor[] flavors = Flavor.values();
        Toppings[] toppings = Toppings.values();
        int x;

        // Code to test the Cone Class
        Cone cone = new Cone(ConeType.Waffle);
        for (x = 0; x < 2 ; x++)
            cone.add(new Confection(types[rand(types.length)], flavors[rand(flavors.length)]));
        cone.add(Toppings.ChocolateSprinkles);
        order.add(cone);

        // Code to test the Dish Class
        Dish dish = new Dish();
        for (x = 0; x < 3 ; x++)
            dish.add(new Confection(types[rand(types.length)], flavors[rand(flavors.length)]));
        dish.add(Toppings.MarshmallowCreme);
        order.add(dish);

        // Code to test the Sundae Class
        Sundae sundae = new Sundae();
        for (x = 0; x < 6 ; x++)
            sundae.add(new Confection(types[rand(types.length)], flavors[rand(flavors.length)]));
        for (x = 0; x < 4 ; x++)
            sundae.add(toppings[rand(toppings.length)]);
        order.add(sundae);

        /*
        Print the contents - each object has its own toString().
        This includes the objects filled with other objects.
         */
        System.out.println("\nThe order contains:");
        for (IceCream i : order)
            System.out.println(i);
    }
}

A sample run using the Project4.java code would look like:

Cone already has Sorbet(Chocolate) (1 scoop only.)
A Cone may not have toppings.
A Dish may only have 2 scoops maximum.
A Dish cannot have toppings. Perhaps you want a Sundae?
A Sundae may only have 5 scoops maximum.
A Sundae may only have 3 toppings maximum.

The order contains:
Waffle cone with Sorbet(Chocolate)
Dish with 2 scoops:Gelato(Vanilla) Gelato(CottonCandy) 
Sundae with 5 scoops:FrozenYogurt(CottonCandy) FrozenYogurt(CrumbsAlongTheMohawk) HardPack(BlackRaspberry) Sorbet(Chocolate) FrozenYogurt(BlackRaspberry)  and 3 toppings: HotFudge Caramel MarshmallowCreme 

Pay very close attention to the output. It will guide you regarding the rules of how many scoops and toppings each type may have.

Submit the project to the Learning Management System as Confection.java, Cone.java, Dish.java and Sundae.java. You need not submit the enumerations provided unless you have changed them. I am always looking for new flavors to try!