Question

1. Sammy’s Seashore Supplies rents beach equipment such as kayaks, canoes, beach chairs, and umbrellas to tourists.

1. Create a Rental class for the company. The class contains:

• Two public final static fields that hold the number of minutes in an hour and the hourly rental rate ($40)
• Four private fields that hold a contract number, number of hours for the rental, number of minutes over an hour, and the price. The contract number is stored as a String because Sammy plans to assign contract numbers such as K681.
• Two public set methods. One sets the contract number (setContractNumber()). The other is named (setHoursAndMinutes()) and it accepts the number of minutes for the rental and then sets the hours, extra minutes over an hour, and the total price. The price is $40 an hour and plus $1 for every extra minute.
• Four public get methods that return the values in four nonstatic fields.
• Two overloaded constructors
  • One constructor accepts a contract number and number of minutes as parameters. Pass these values to the setContractNumber() and setHoursAndMinutes() methods, respectively. The setHoursAndMinutes() method will automatically calculate the rent.
  • The other constructor is a default constructor that passes “A000” and 0 to the two-parameter constructor. (use this() reference)

Save the above file as Rental.java.                                                  (5 Marks)

b.         Create a RentalDemo class to instantiate two Rental objects.

• Instantiate one object to retain the constructor default values.
• Accept user data for the contract number and minutes fields, and use this data set to instantiate the second object. (Hint: Create two static methods which prompt user to enter contract number and number of minutes, respectively (use Scanner class) and return these values to main() method in two local variables and then pass these variables to two-parameter constructor.
• Display all the details for both objects (use a static displayDetails() method)

Save the above file as RentalDemo.java.                                        (5 Marks)

Answer 1

PROGRAM:

Rental.java :

package HomeworkLib.answers;

public class Rental {
    // Two public final static fields
    public final static int num_min = 60;
    public final static int hourly_rent_rate = 40;

    // Four private fields
    private String contract_number;
    private int num_of_hours_for_rental, num_of_minutes_over_an_hour, price;

    // default constructor
    Rental(){
        this("A000", 0);
    }

    // parameterized constructor
    Rental(String contract, int minutes){
        setContractNumber(contract);
        setHoursAndMinutes(minutes);
    }

    // setter method for Contract Number
    public void setContractNumber(String contract){
        contract_number = contract;
    }

    // setter method for Hours and Minutes
    public void setHoursAndMinutes(int minutes){
        num_of_hours_for_rental = minutes / 60;
        num_of_minutes_over_an_hour = minutes - (num_of_hours_for_rental * 60);
        price = (num_of_hours_for_rental * hourly_rent_rate) + num_of_minutes_over_an_hour;
    }

    // getter method to get Contract Number
    public String getContractNumber(){
        return contract_number;
    }

    // getter method to get Number of Hours for Rental
    public int getHoursRental(){
        return num_of_hours_for_rental;
    }

    // getter method to get Number of Minutes for Rental
    public int getMinutesRental(){
        return num_of_minutes_over_an_hour;
    }
    
    // getter method to get the price
    public int getPrice() {
        return price;
    }
}

RentalDemo.java :

package HomeworkLib.answers;

// importing Scanner
import java.util.Scanner;
public class RentalDemo {
    // creating scanner object
    Scanner sc = new Scanner(System.in);

    public static void main(String args[]){
        // creating RentalDemo Class object
        RentalDemo rd = new RentalDemo();

        // creating 1st object for Rental Class
        Rental obj1 = new Rental();
        
        // calling methods using 1st object and storing the returned values
        String obj1_contract = obj1.getContractNumber();
        int obj1_hours = obj1.getHoursRental();
        int obj1_minutes = obj1.getMinutesRental();
        int obj1_price = obj1.getPrice();
        
        // calling this class display method
        rd.displayDetails(obj1_contract, obj1_hours, obj1_minutes, obj1_price);

        // getting contract and minutes
        String contract = rd.setContract();
        int minutes = rd.setMinutes();

        // creating 2nd object for Rental Class
        Rental obj2 = new Rental(contract,minutes);
        
        // calling methods using 2nd object and storing the returned values
        String obj2_contract = obj2.getContractNumber();
        int obj2_hours = obj2.getHoursRental();
        int obj2_minutes = obj2.getMinutesRental();
        int obj2_price = obj2.getPrice();
        
        // calling this class display method
        rd.displayDetails(obj2_contract, obj2_hours, obj2_minutes, obj2_price);
    }

    // method to get contract number from user
    public String setContract(){
        System.out.println("Enter contract number: ");
        return  sc.nextLine();
    }

    // method to get number of minutes from user
    public int setMinutes(){
        System.out.println("Enter the minutes: ");
        return sc.nextInt();
    }
    
    // method to display values
    public void displayDetails(String contract, int hours, int minutes, int price){
        System.out.println("Contract Number: " + contract);
        System.out.println("Number of hours: " + hours);
        System.out.println("Number of minutes: " + minutes);
        System.out.println("Total price: " + price);
        System.out.println();
    }
}

OUTPUT:

Contract Number: A000
Number of hours: 0
Number of minutes: 0
Total price: 0

Enter contract number:
K681
Enter the minutes:
157
Contract Number: K681
Number of hours: 2
Number of minutes: 37
Total price: 117

SCREENSHOTS:

Rental.java :

RentalDemo.java :

Output :

Remove the line "package HomeworkLib.answers;" before executing it yourself.

Hope this helps!