20754 - VictoriaBrown/MyProgrammingLab_Ch10 GitHub Wiki

QUESTION:

Given the abstract class , RentableDwelling, containing: a (private ) double instance variable , rentPerUnit a constructor accepting a double used to initialize rentPerUnit a method , getRentPerUnit that returns the value of rentPerUnit an abstract method getRentalIncome that returns a double write a (non-abstract) subclass, ApartmentHouse, containing: an int instance variable numberOfApartments a constructor accepting a double , passed to the superclass constructor , and an int used to initialize numberOfApartments the method getRentalIncome calculated as the product of numberOfApartments and the rent per unit. getRentalIncome returns a double .

CODE:

public class ApartmentHouse extends RentableDwelling {

	// Instance variable:
	private int numberOfApartments;

	// Constructor:
	public ApartmentHouse(double rentPerUnit, int numberOfApartments) {
	
		// Pass rentPerUnit to superclass:
		super(rentPerUnit);
		
		// Initialize numberOfApartments
		this.numberOfApartments = numberOfApartments;
	}

	// Rental income method; returns number of aparments * rent per unit:
	public double getRentalIncome() {
		return (numberOfApartments * super.getRentPerUnit());
	}	
}