Question

PLEASE DO NOT OVERRIDE ANY EXCEPTIONS

TASK:

You want to develop a Java program that will allow you to keep track of a set of employees. In reviewing your employee list, you notice that your employees fall into two categories: Salaried and Hourly. The following table shows the information that you keep in your employee list for each type of employee.

Field	Type	Salaried	Hourly
id	int	Yes	Yes
name	String	Yes	Yes
title	String	Yes	No
position	String	No	Yes
salary	int	Yes	No
hourlyRate	double	No	Yes

Create a NetBeans project with the prefix Lab101.

Use the same naming convention used in the Lab100 assignment, i.e. Lab101-LastFM.

In this project create three classes named Employee, Salaried and Hourly such that:

• The Employee class contains all of the fields common to both types of entries in your employee list.
• The Salaried class is a subclass of Employee and contains only those fields that are specific to the Salaried entries in your employee book.
• The Hourly class is a subclass of Employee and contains only those fields that are specific to the Hourly entries in your employee book.
• Each of these classes contains all of the “normally expected” methods. The “normally expected” methods are:
  • At least one constructor that is an overload constructor that includes all of the necessary information to create an instance.
  • A getter and setter (accessor and mutator) method for each instance/class variable
  • A toString method
  • An equals method
• Create your classes so that you can keep track of the
  • Total number of Employees
  • Total number of Salaried employees
  • Total number of Hourly employees
  • Note that you are tracking the number of times each class has been instantiated, i.e. a constructor has been called.

Create a fourth class name Client that will be used to test your other classes.

In the Client class:

• This class must include the main method
• In the main method
  • Create an array employeeList of type Employee of length 10
  • Add three Salaried contacts to the array
  • Add three Hourly employees contacts to the array
  • Data for each of the contacts must be entered from the keyboard.
  • The employee types must NOT be grouped, i.e. the salaried employees should be interleaved with the hourly employees.
  • Once you entered the data for the six employees:
    • print out the contents of the array using a loop.
    • This loop should print out the contents of every entry in the array including the blank (null) entries.
  • Now give everyone in the employeeList a 10% raise.
    • When applying the raises use a loop to step across the array.
  • After you have given everyone a 10% raise:
    • Print out the contents of the array using a loop.
    • This time do not print the blank (null) entries.
  • Explicitly test the equals methods for each of your classes.

Answer 1

//Java code

public abstract class Employee {
    /**
     * Attributes common to all
     */
    protected int id;
    protected String name;
    //Constructor

    public Employee(int id, String name) {
        this.id = id;
        this.name = name;
    }

    //Getters and setters

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    /**
     *
     * @return description of employee
     */
    @Override
    public String toString() {
        return "Employee Id: "+id+" Employee's Name: "+name;
    }

    @Override
    public boolean equals(Object obj) {
        return this== ((Employee)obj);
    }
}

//==========================================

public class Salaried extends Employee {
    private String title;
    private int salary;
    private static int countSalariedEmployee =0;
    //Constructor

    public Salaried(int id, String name, String title, int salary) {
        super(id, name);
        this.title = title;
        this.salary = salary;
        countSalariedEmployee++;
    }

    //getters and setters


    public static int getCountSalariedEmployee() {
        return countSalariedEmployee;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public int getSalary() {
        return salary;
    }

    public void setSalary(int salary) {
        this.salary = salary;
    }

    /**
     *
     * @return description of salaried employee
     */
    @Override
    public String toString() {
        return super.toString()+" Title: "+title+" salary: $"+salary;
    }
}

//==================================================

public class Hourly extends Employee {
    private String position;
    private double hourlyRate;
    private static int countHourlyEmployee=0;

    //Constructor

    public Hourly(int id, String name, String position, double hourlyRate) {
        super(id, name);
        this.position = position;
        this.hourlyRate = hourlyRate;
        countHourlyEmployee++;
    }

    //getters and setters


    public String getPosition() {
        return position;
    }

    public void setPosition(String position) {
        this.position = position;
    }

    public double getHourlyRate() {
        return hourlyRate;
    }

    public void setHourlyRate(double hourlyRate) {
        this.hourlyRate = hourlyRate;
    }

    /**
     *
     * @return description of the hourly Employee
     */
    @Override
    public String toString() {
        return super.toString()+ " Position: "+position+" Hourly Rate: $"+String.format("%.2f",hourlyRate);
    }
}

//=======================================

import java.util.Scanner;

public class Client {
    public static void main(String[] args)
    {
        /**
         * Create an array employeeList of type Employee of length 10
         */
        int length = 10;
        Employee[] employeeList = new Employee[length];
        /**
         * Add three Salaried contacts to the array
         */
        String name,position, title ;
        int id, salary;
        double hourlyRate;
        //Scanner for keyboard entry
        Scanner keyboard = new Scanner(System.in);
        for (int i = 0; i <6 ; i++) {
            if(i%2==0) {
                System.out.print("Enter Employee's Id: ");
                id = keyboard.nextInt();
                System.out.print("Enter Employee's name: ");
                name = keyboard.nextLine();
                keyboard.nextLine();
                System.out.print("Enter Employee's title: ");
                title = keyboard.nextLine();
                System.out.print("Enter Employee's salary: ");
                salary = keyboard.nextInt();

                employeeList[i] = new Salaried(id, name, title, salary);
            }
            /**
             * Add three Hourly employees contacts to the array
             */
            else
            {
                System.out.print("Enter Employee's Id: ");
                id = keyboard.nextInt();
                keyboard.nextLine();
                System.out.print("Enter Employee's name: ");
                name = keyboard.nextLine();
                System.out.print("Enter Employee's position: ");
                position = keyboard.nextLine();

                System.out.print("Enter Employee's hourly rate: ");
                hourlyRate = keyboard.nextDouble();
                employeeList[i] = new Hourly(id,name,position,hourlyRate);
            }
        }

        /**
         * print out the contents of the array using a loop.
         */
        for(Employee e: employeeList)
        {
            System.out.println(e);
        }
        /**
         * Now give everyone in the employeeList a 10% raise
         */
        for (int i = 0; i <employeeList.length ; i++) {
            if(employeeList[i]!=null)
            {
                if(employeeList[i] instanceof Salaried)
                {
                    salary = ((Salaried)employeeList[i]).getSalary();
                    salary +=salary*.1;
                    ((Salaried)employeeList[i]).setSalary(salary);
                }
                else
                {
                    hourlyRate = ((Hourly)employeeList[i]).getHourlyRate();
                    hourlyRate+=hourlyRate*.1;
                    ((Hourly)employeeList[i]).setHourlyRate(hourlyRate);
                }
            }
        }
        /**
         * print without null
         */
        for(Employee e: employeeList)
        {
            if(e==null)
                break;
            System.out.println(e);
        }
        //Check equality
        System.out.println(employeeList[0].equals(employeeList[2]));
        System.out.println(employeeList[1].equals(employeeList[4]));
    }
}

//Output

//If you need any help regarding this solution ............ please leave a comment ........ thanks