Coffee Makers

Please implement a small class hierarchy of coffee makers. There is a superclass CoffeeMaker which has two subclasses, Aeropress and KeurigMachine. Each CoffeeMaker has a method makeCoffee() which behaves differently depending on the kind of coffee maker.

CoffeeTester class

This class is given to you and contains the main method. Do not modify it in your submission.

CoffeeMaker Superclass

Each 'CoffeeMaker' has a 'modelNumber', which is an integer. It has the following methods:

• A constructor with an integer parameter for the model number.
• A method getModelNumber() which returns the model number.
• An abstract method makeCoffee() that does not return anything.

Aeropress Subclass

• Aeropress is a subclass of CoffeeMaker.
• The constructor should have an integer parameter for the model number.
• Please override makeCoffee() to print the following (including a newline): Push - drip - push - drip
• Please override toString() to return "Aeropress model " followed by the model number. So, for an Aeropress with model number 55 it would return: "Aeropress model 55"

KeurigMachine Subclass

• KeurigMachine is a subclass of CoffeeMaker.
• The constructor should have an integer parameter for the model number.
• Please override makeCoffee() to print the following (including a newline): Drip drip drip - done
• Please override toString() to return "Keurig model " followed by the model number. So, for a KeurigMachine with model number 42 it would return: "Keurig model 42"

Please implement this hierarchy according to the specifications above and using best object-oriented programming principles . Any missing details should be filled in using best object-oriented programming principles.

GIVEN CODE

public class CoffeeTester{

public static void main(String[] args){ Aeropress aero = new Aeropress(420); CoffeeMaker keurig = new KeurigMachine(1);

System.out.println(aero); aero.makeCoffee();

System.out.println(keurig); keurig.makeCoffee(); } }