R Java Code

import java.util.Scanner;

abstract class Employee {
    private String firstName;
    private String lastName;
    private String id;
    private String street;
    private String city;
    private String state;

    protected Employee() {
    }

    protected Employee(String firstName, String lastName, String id, String street,
            String city, String state) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.id = id;
        this.street = street;
        this.city = city;
        this.state = state;
    }

    public abstract double earnings();
}

abstract class HourlyEmployee extends Employee {
     //Data field
    double hourlyRate;
    int hoursWorked;

    //Constructor
    HourlyEmployee () {
    }

    HourlyEmployee (String firstName, String lastName, String id, String street, String city, String state, double hourlyRate, int hoursWorked) {
        super(firstName, lastName, id, street, city, state);
        this.hourlyRate = hourlyRate;
        this.hoursWorked = hoursWorked;
    }

    public double earnings (double hourlyRate, int hoursWorked) {
        return hourlyRate * hoursWorked;
    }
}

public class TestAbstractEmployee {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        //Hourly Employee 1
        System.out.println("Employee #1");
        System.out.print("Please enter first name: ");
        String firstName1 = input.nextLine();
        System.out.print("Please enter last name: ");
        String lastName1 = input.nextLine();
        System.out.print("Please enter ID: ");
        String id1 = input.nextLine();
        System.out.print("Please enter street address: ");
        String street1 = input.nextLine();
        System.out.print("Please enter city: ");
        String city1 = input.nextLine();
        System.out.print("Please enter state: ");
        String state1 = input.nextLine();
        System.out.print("Please enter hourly rate: ");
        double hourlyRate1 = input.nextDouble();
        System.out.print("Please enter hours worked: ");
        int hoursWorked1 = input.nextInt();
        HourEmployee emp1 = new HourEmployee(firstName1, lastName1, id1, street1, city1, state1, hourlyRate1, hoursWorked1);
        double earnings1 = emp1.earnings(hourlyRate1, hoursWorked1);

        System.out.println();

        //Hourly Employee 2

        System.out.println("Employee #2");
        System.out.print("Please enter first name: ");
        String firstName2 = input.nextLine();
        input.nextLine();
        System.out.print("Please enter last name: ");
        String lastName2 = input.nextLine();
        System.out.print("Please enter ID: ");
        String id2 = input.nextLine();
        System.out.print("Please enter street address: ");
        String street2 = input.nextLine();
        System.out.print("Please enter city: ");
        String city2 = input.nextLine();
        System.out.print("Please enter state: ");
        String state2 = input.nextLine();
        System.out.print("Please enter hourly rate: ");
        double hourlyRate2 = input.nextDouble();
        System.out.print("Please enter hours worked: ");
        int hoursWorked2 = input.nextInt();
        HourEmployee emp2 = new HourEmployee(firstName2, lastName2, id2, street2, city2, state2, hourlyRate2, hoursWorked2);
        double earnings2 = emp2.earnings(hourlyRate2, hoursWorked2);

        System.out.println();

        //Display results
        //Employee #1
        System.out.println("Employee #1 Data:");
        System.out.println("First Name: " + firstName1);
        System.out.println("Last Name: " + lastName1);
        System.out.println("ID: " + id1);
        System.out.println("Home street address: " + street1);
        System.out.println("Home city: " + city1);
        System.out.println("Home state: " + state1);
        System.out.println("Hourly rate: " + hourlyRate1);
        System.out.println("Hours worked: " + hoursWorked1);
        System.out.println("Total earnings: $" + earnings1);

        System.out.println();

        //Employee #2
        System.out.println("Employee #2 Data:");
        System.out.println("First Name: " + firstName2); // I don't understand why console won't print out firstName2.
        System.out.println("Last Name: " + lastName2);
        System.out.println("ID: " + id2);
        System.out.println("Home street address: " + street2);
        System.out.println("Home city: " + city2);
        System.out.println("Home state: " + state2);
        System.out.println("Hourly rate: " + hourlyRate2);
        System.out.println("Hours worked: " + hoursWorked2);
        System.out.println("Total earnings: $" + earnings2);
    }
}