Question

Specifications

• Create an abstract Employee class that provides private attributes for the first name, last name, email address, and social security number. This class should provide functions that set and return the employee’s first name, last name, email address, and social security number. This class has a function: get_net_income which returns 0.
• Create a Manager class that inherits the Employee class. This class should add private attributes for years of experience and the annual salary. This class should also provide necessary set and get functions. It should add a bonus ($1,000/year of experience) to the annual salary. The income tax rate should be 30%. This class should override the get_net_income function of the Employee class. Note that the gross income is calculated as follows:
  • bonus = years of experience * 1000
  • gross income = annual salary + bonus
  • tax rate = 30%
  • income tax = gross income * tax rate
  • net income = gross income - income tax
• Create a Representative class that inherits the Employee class. This class should add private attributes for the weekly hours of work and the pay rate. This class should also provide necessary set and get functions. The income tax rate should be 20%. This class should override the get_net_income function of the Employee class. Note that the gross income is calculated as follows:
  • gross income = weekly hours of work * 52 * pay rate
  • tax rate = 20%
  • income tax = gross income * tax rate
  • net income = gross income - income tax
• In the main function, the program should create Manager or Representative objects from the data entered by the user and save them in a list named employees. After the user has terminated data entries, your program should display the information of all employees on the output with this format: last name, first name, email, social security number, net income.

Sample Output (Your output should be similar to the text in the following box)

Welcome to my app EMPLOYEE DATA ENTRY Manager or Representative? (m/r): d Invalid selection. Continue? (y/n): y Manager or Representative? (m/r): m First Name: Frank Last Name: Wilson Email Address: [email protected] SSN: 111-22-3333 Years of Experience: 3 Annual Salary: 95000 Continue? (y/n): y Manager or Representative? (m/r): r First Name: John Last Name: Atkins SSN: 222-33-4444 Email Address: [email protected] Weekly Hours of Work: 40 Pay Rate: 20 Continue? (y/n): n EMPLOYEE INFORMATION Wilson, Frank, [email protected], 111-22-3333, $68600.00 Atkins, John, [email protected], 222-33-4444, $33280.00 Thank you for using my app

Answer 1

Following is the answer:

Employee.java

public class Employee {
    private String firstName;
    private String lastName;
    private String email;
    private int ssn;

    Employee(){}

    Employee(String firstName, String lastName, String email, int ssn){
        this.firstName = firstName;
        this.lastName = lastName;
        this.email = email;
        this.ssn = ssn;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getSsn() {
        return ssn;
    }

    public double get_net_income(){
        return 0;
    }

    public void setSsn(int ssn) {
        this.ssn = ssn;
    }
}

Manager.java

public class Manager extends Employee {
    private double expr;
    private double annualSalary;

    Manager(String firstName, String lastName, String email, int ssn, double expr, double annualSalary){
        super(firstName, lastName, email, ssn);
        this.expr = expr;
        this.annualSalary = annualSalary;
    }

    public double getExpr() {
        return expr;
    }

    public void setExpr(double expr) {
        this.expr = expr;
    }

    public double getAnnualSalary() {
        return annualSalary;
    }

    public void setAnnualSalary(double annualSalary) {
        this.annualSalary = annualSalary;
    }

    @Override
    public double get_net_income() {
        double bonus = expr * 1000;
        double grossincome = annualSalary + bonus;
        double tax = grossincome * 0.30;
        return grossincome - tax;
    }

    @Override
    public String toString() {
        return super.getFirstName() + ", "  + super.getLastName() + ", " + super.getEmail() + ", " + super.getSsn() + ", " + this.get_net_income();
    }
}

Representative.java

public class Representative extends Employee {
    private int hours;
    private double payRate;

    Representative(String firstName, String lastName, String email, int ssn, int hours, double payRate){
        super(firstName, lastName, email, ssn);
        this.hours = hours;
        this.payRate = payRate;
    }

    public int getHours() {
        return hours;
    }

    public void setHours(int hours) {
        this.hours = hours;
    }

    public double getPayRate() {
        return payRate;
    }

    public void setPayRate(double payRate) {
        this.payRate = payRate;
    }

    @Override
    public double get_net_income() {
        double gross = hours * 52 * payRate;
        double tax = gross * 0.20;
        return gross-tax;
    }

    @Override
    public String toString() {
        return super.getFirstName() + ", "  + super.getLastName() + ", " + super.getEmail() + ", " + super.getSsn() + ", " + this.get_net_income();
    }
}

Emp.java(main)

import java.util.ArrayList;
import java.util.Scanner;

public class Emp {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Welcome to the app");
        char choice = 0;
        ArrayList<Employee> arr = new ArrayList<Employee>();
        do{
            System.out.println("EMPLOYEE DATA ENTRY");
            char ch;
            System.out.println("Manager or Representative? (m/r): ");
            ch = sc.next().charAt(0);
            if(ch == 'm' || ch == 'r'){
            switch (ch){
                case 'm':
                    System.out.println("First name: ");
                    String firstname = sc.next();
                    System.out.println("Last name: ");
                    String lastname = sc.next();
                    System.out.println("Email:");
                    String email = sc.next();
                    System.out.println("SSN");
                    int ssn = sc.nextInt();
                    System.out.println("Years of Experience: ");
                    int year = sc.nextInt();
                    System.out.println("Annual Salary: ");
                    double salary = sc.nextDouble();
                    Manager m = new Manager(firstname,lastname,email,ssn,year,salary);
                    arr.add(m);
                    break;

                case 'r':
                    System.out.println("First name: ");
                    String firstname1 = sc.next();
                    System.out.println("Last name: ");
                    String lastname1 = sc.next();
                    System.out.println("Email:");
                    String email1 = sc.next();
                    System.out.println("SSN");
                    int ssn1 = sc.nextInt();
                    System.out.println("Weekly Hours of Work: ");
                    int hours = sc.nextInt();
                    System.out.println("Pay Rate: ");
                    double payrate = sc.nextDouble();
                    Representative r = new Representative(firstname1,lastname1,email1,ssn1,hours,payrate);
                    arr.add(r);
                    break;
            }
            }else{
                System.out.println("Invalid selection.");
            }
            System.out.println("Continue? (y/n):");
            choice = sc.next().charAt(0);
        }while (choice == 'y');
        System.out.println("EMPLOYEE INFORMATION");

        for(int i = 0 ; i < arr.size() ; i++){
            System.out.println(arr.get(i).toString());
        }
    }
}

Output: