Question

Goals

To design and program basic solutions for the small business problem: arranging average incomes.

Description

The company XYZ practices two ways of compensations for its employees: fixed salary and hourly wage.

For salary-based employees, the average monthly income is the annual salary divided by 12. For hourly-based employees, the average monthly income is 20.8 * 8 * [hourly rate] under the assumption that there are 250 working days in a year.

You must create a Java language program that makes a list of employees ordered according to their average monthly income.

Program requirements

Create three classes: a superclass and two subclasses to represent employees with a fixed salary and with an hourly wage.  

Employee’s data must include:

• Employee ID,
• First Name,
• Type of Compensation,
• Annual Salary or Hourly Rate (depending on the type of compensation).

Employee ID must be formed automatically as a total number of employees plus one.

The superclass must have an abstract method to calculate an average monthly income. Subclasses must override this method.

Your program must input data about employees from the console and sort it in descending order of the average monthly income. Employees with equal average monthly income must be listed in the ascending order of their First Names.

Output sorted data to the console and the text file.

Suggestions:

• use a static field in generating Employee ID,
• use an array and any sorting algorithm,
• for debugging purpose, use the test data hardcoded or retrieved from a text file,
• override default toString() method.

Example: for the input (fixed, “David", 50000), (fixed, “Mark", 20000), (hourly, ”June", 50), (hourly, “Alex", 50), (fixed, “Steve", 25000), the following output expected

Mark #2 fixed  $1,666.67

Steve #5 fixed  $2,083.33

David #1 fixed  $4,166.67

Alex #4 hourly $8,320.00

June #3 hourly $8,320.00

Submission should include:

1. Java source code as files named P2*.java. Asterisk means that you may choose names for your files, but they all must start with ‘P2’.
2. A screenshot with your program dialog and outputs.

Answer 1

//CODE:

/////////////////////////////////////////////////////////////////////////////////////
//////AUTHOR : Ramcharan jethu////////////////////////
//////////////////////////////////////////////////////////////////////////////////

import java.util.*;
import java.lang.*;
import java.math.*;

//Employee class
abstract class Employee
{
int Employee_id;
String FirstName;
String TypeofCompensation;
double Rate;
static int count=0;
  
public Employee()       //Default constructor
{
count++;
this.Employee_id=count;
}
public Employee(String name,String toc,double r)   //Parameterized constructor
{
this.FirstName=name;
this.TypeofCompensation=toc;
this.Rate=r;
count++;
this.Employee_id=count;
}
public abstract double CalculateMonthlyIncome();   //abstract method
}

//subclass of Employee
class FixedSalaryEmployee extends Employee
{
public FixedSalaryEmployee()
{
//Default constructor
}
public FixedSalaryEmployee(String name,String toc,double r)
{
super(name,toc,r);
}
public double CalculateMonthlyIncome()       //override abstract method
{
double averageMonthlyIncome=Rate/(12.0);
return averageMonthlyIncome;
}
public String toString()       //override toString method
{
return FirstName+" #"+Employee_id+" "+TypeofCompensation+" $"+String.format("%1.2f",CalculateMonthlyIncome(),2);
}
}

//subclass of Employee
class HourlyWageEmployee extends Employee
{
public HourlyWageEmployee()
{
  
}
public HourlyWageEmployee(String name,String toc,double r)
{
super(name,toc,r);
}
public double CalculateMonthlyIncome()
{
double averageMonthlyIncome=Rate*20.8*8;
return averageMonthlyIncome;
}
public String toString()
{
return FirstName+" #"+Employee_id+" "+TypeofCompensation+" $"+String.format("%1.2f",CalculateMonthlyIncome(),2);
}
}

//sorter class to compare the avrage monthly income in order to sort list of employees
class Sorter implements Comparator<Employee>
{
@Override
public int compare(Employee o1, Employee o2) {
       double m1=o1.CalculateMonthlyIncome();
       double m2=o2.CalculateMonthlyIncome();
       if(m1==m2)
           return o1.FirstName.compareTo(o2.FirstName);
       else
           return Double.compare(o1.CalculateMonthlyIncome(),o2.CalculateMonthlyIncome());
}
}
class P2Manager
{
public static void main(String []args)
{
Scanner sc=new Scanner(System.in);
System.out.println("How many number of Employees are there :");
int n=sc.nextInt();
  
      
ArrayList<Employee> list=new ArrayList<Employee>();
System.out.println("\nEnter Type of compensation, name,rate for each employee:\n");
for(int i=0;i<n;i++)
{
String type=sc.next();
String nm=sc.next();
double r=sc.nextDouble();
if(type.equals("fixed"))
{
list.add(new FixedSalaryEmployee(nm,type,r));
}
else
{
list.add(new HourlyWageEmployee(nm,type,r));
}
}
       System.out.println("\n");
list.sort(new Sorter());
for(int i=0;i<n;i++)
{
System.out.println(list.get(i).toString());
}
}
}

//Screenshot :