Write a JAVA Program named Project2 that maintains wage information for the empl

ID: 3686861 • Letter: W

Question

Write a JAVA Program named Project2 that maintains wage information for the employees of a company.

The company maintains a text file of all of the current employees called EmployeesIn.dat.

Each line of the file contains the employees name (last name, first name), a character code indicating their wage status (h for hourly or s for salary), and their wage (pay/hour for hourly employees and the annual salary for salary employees). The name, wage status and wage are separated by varying amounts of white space (at minimum, there are two spaces).

For example,

Harris, Joan h 5.00

Baird, Joey h 7.50

Kinsey, Paul h 8.00

Olson, Margaret s 15000

Campbell, Peter s 20000

Draper, Donald s 40000

Sterling, Roger s 45000

Cooper, Bertram s 50000

Once a week (generally on Friday), updates to the file are made and the weekly paycheck amount is calculated. The update information is read from a second text file called Updates.dat. Updates can be any of the following:

adding a new employee (n),

raising the rate of pay for all employees by a given percentage (r), or

dismissal of an existing employee (d).

For example, the file could contain the following lines:

n Pryce, Lane s 40000

r 5

d Kinsey

After performing the updates, the revised information is written to a text file named EmployeesOut.dat a summary report is displayed on the console in the following format,

New Employee added: Pryce, Lane

New Wages:

Harris, Joan $5.25/hour

Baird, Joey $7.88/hour

Olson, Margaret $15750.00/year

Campbell, Peter $21000.00/year

Draper, Donald $42000.00/year

Sterling, Roger $47250.00/year

Cooper, Bertram $52500.00/year

Pryce, Lane $42000.00/year

Deleted Employee: Kinsey, Paul

Paycheck amounts are calculated based on each employees number of hours worked. This information is included in the file HoursWorked.dat. This file simply lists each employees last name and the number of hours worked that week, separated by white space. For example,

Harris 65

Baird 40

Olson 70

Campbell 40

Draper 60

Sterling 40

Cooper 35

Pryce 45

After calculating each employees pay for the week, a report is displayed on the console in the following format,

Paycheck amount:

Harris, Joan $406.88

Baird, Joey $315.00

Olson, Margaret $302.88

Campbell, Peter $403.85

Draper, Donald $807.69

Sterling, Roger $908.65

Cooper, Bertram $1009.62

Pryce, Lane $807.69

--------- Total $4962.26

(Please note that all the examples shown are for formatting purposes only; do not expect that the numeric values reflect correct calculations in any way.)

Write two classes that store information about an employee:

HourlyEmployee, which extends the abstract class Employee. The constructor will take a name and hourly wage as its parameters. Methods will include computePay and toString. To determine the employees pay computePay multiples the first 40 hours (or fewer) by the employees hourly wage. Hours worked beyond 40 are paid at time-and a-half (1.5 times the hourly wage). toString() returns a string containing the employees name and hourly wage, formatted as shown in the example output of the r command. Note that spaces are added between the names and wage so that the entire string is 40 characters long.

SalariedEmployee, which extends the abstract class Employee. The constructor will take a name and annual salary as its parameters. Methods will include a getter and a setter for the annual salary, along with computePay and toString(). (Note that the annual salary must be converted to an hourly wage, because thats what the Employee class requires. To do this conversion, assume that a salaried employee worked 40 hours a week for 52 weeks) computePay always returns 1/52 of the annual salary, regardless of the number of hours worked. toString() returns a string containing the employees name and annual salary, formatted as shown in the example output for the r command. (Do not add a separate instance variable for the annual salary. Follow the program specifications in order to receive full credit for this project.)

Use an array to store employee records of data type Employee. The array should be managed in a class called PersonnelManager. Each element of the array will store a reference to either an HourlyEmployee object or a SalariedEmployee object. The array used to store employee objects must contain only one element initially. When the array becomes full, it must be doubled in size by calling a method written for this purpose in the PersonnelManager class.

Your main method is located in the Project2 class. It instantiates a PersonnelManager object and calls methods to handle reading and writing the data files. It instantiates a PersonnelManager object in order to process the employee updates and generate the weekly payroll

Here are a few other requirements for the program:

After updating the employee records and calculating the weekly payroll, the revised employee information is to be stored in the same format as the original EmployeesIn.dat file. However, name this output file EmployeesOut.dat.

Dollar amounts must be displayed correctly, with two digits after the decimal point. For example, make sure that your program displays $100.00 not $100.0.

All input may be preceded or followed by spaces. Character command codes may be uppercase or lowercase letters. If the user enters a character code other than n, d, h, s, or r, the program must display the following message along with the line containing the invalid character:

Command was not recognized; <line containing the error>

Write this program in JAVA and compile it in JDK 1.8 or better. Follow all commenting conventions discussed in class, including a comment block at the top of the each file with your name, date, the course number and section, program purpose, input, and output. It is expected that your program will be well documented and you are required to include a private helper method called printHeading that outputs the following information to the console in an easy-to-read format: your name, the project number, the course identifier, and the current semester. You will call this method as the first statement in your main method.

Explanation / Answer

Employee.dat

Michael Jordan $600000.00/year
Lebron James $600.00/hour

Employee.java

import java.util.*;

public class Employee
{
   //Instance variables
   private String name;
   private double hrWage;

   //Constructor
   public Employee(String name, double hrWage)
   {
       this.name = name;
       this.hrWage = hrWage;

}

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

   public void setWage(double hrWage)
   {
       this.hrWage = hrWage;

}

   public void raiseWage(double percentage)
   {
       this.hrWage = hrWage*(1+(percentage/100));   //20$/hr * (1 + 30%) increase

}

   public double computePay(int hrsworked)
   {   return this.hrWage*hrsworked; }

   public String getName()
   { return this.name; }

   public double getWage()
   { return this.hrWage; }

}

HourlyEmployee.java

import java.util.*;
import java.text.*;

public class HourlyEmployee extends Employee
{

   public HourlyEmployee(String name, double hrWage)
   {
       super(name,hrWage);

}

public double computePay(int hrsworked)
{

       if(hrsworked>40)
       return 40*(super.getWage()) + (hrsworked-40)*(1.5*super.getWage());
       else
       return hrsworked*(super.getWage());

}

public String getName()
{ return super.getName(); }

   public String toString()
   {
       DecimalFormat fix = new DecimalFormat("0.00");
       return super.getName()+" $"+fix.format(super.getWage())+"/hour ";

}

Personnel.java

import java.text.*;
import java.io.*;
import java.util.*;
public class Personnel
{

public static Scanner stdin = new Scanner(System.in);
public static ArrayList<Object> database = new ArrayList<Object>(1);

   public static void main (String[]args) throws IOException
   {
       menu();

}

public static void menu() throws IOException
{

clearScreen();

for(int i = 0; i < 40; i++)
System.out.print("-");

System.out.println();

System.out.print("|Commands: n - New employee | ");

for(int i = 0; i < 40; i++)
System.out.print("-");

System.out.println();

System.out.print("Enter Command:");
char command = stdin.nextLine().toLowerCase().charAt(0);

switch (command)
{

           case 'n': new_emp();
                  menu();
                  break;
           case 'c': compute_pay();
                  menu();
                  break;

           case 'r': raise_wages();
                  menu();
                  break;

           case 'p': print_records();
                  menu();
                  break;
           case 'd': download();
                  menu();
                  break;

           case 'u': upload();
                  menu();
                  break;

case 'q': break;

           default : System.out.println("Command was not recognized; press enter to try again...");
                  stdin.nextLine();
                  menu();
       }

}

   private static void clearScreen()
       {
           System.out.println("u001b[Hu001b[2J");
       }

   public static void new_emp()
   {

       System.out.print("Enter the name of new employee: ");
       String emp_name = stdin.nextLine();

System.out.print(" Hourly (h) or salaried (s): ");
char emp_type = stdin.nextLine().toLowerCase().charAt(0);

           switch (emp_type)
           {
               case 'h':
                       System.out.print(" Enter hourly wage: ");
                       double hrwage = stdin.nextDouble();
                       database.add(new HourlyEmployee(emp_name,hrwage));
                       break;

               case's':
                       System.out.print(" Enter Annual Salary: ");
                       double salary = stdin.nextDouble();
                       database.add(new SalariedEmployee(emp_name,salary));
                       break;

               //If anything else show error message
               default:   System.out.println("Input was not h or s; please try again:");
                       new_emp();
                       break;
           }


       System.out.println("Press Enter to continue...");
       stdin.nextLine();
       stdin.nextLine();

}

   public static void compute_pay() //Computes pay for any employee
   {
       DecimalFormat fix = new DecimalFormat("0.00"); //To format currency properly
       database.trimToSize();               //Always trim arraylist for efficiency

       for(int i = 0; i < database.size(); i++)
       {
           System.out.print(" Enter number of hours worked by "+((Employee) database.get(i)).getName()+":");
           int hrs = stdin.nextInt();
           System.out.println("Pay: $"+fix.format( ((Employee) database.get(i)).computePay(hrs)) );
       }

       System.out.println();

       System.out.println("Press Enter to continue...");
       stdin.nextLine();
       stdin.nextLine();

   }

   public static void raise_wages() //Raises all wages by a certain percentage
   {

database.trimToSize();

       System.out.print("Enter percentage increase: ");
       double percentincrease = stdin.nextDouble();

       for(int i = 0; i < database.size(); i++)
       ((Employee) database.get(i)).raiseWage(percentincrease);

       System.out.println(" New Wages _________");
       print_records();

stdin.nextLine();

}

   public static void print_records()
   {
       if(database.isEmpty())
       System.out.println("There are currently no records");
       else
       {
           for(int i = 0; i < database.size(); i++)
           System.out.print(((Employee) database.get(i)).toString());
       }

       System.out.println("Press Enter to continue...");
       stdin.nextLine();

   }

public static void download() throws IOException //Saves all current records in file Employee.dat
{

database.trimToSize();

       PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("Employee.dat")));
       for(int i = 0; i < database.size(); i++)
       out.print(((Employee) database.get(i)).toString());

out.close();

System.out.println("Total Employees Processed:"+database.size()+" Press Enter to continue...");
stdin.nextLine();

}

public static void upload() throws IOException //Loads all current records from file Employee.dat into arraylist
{

database.trimToSize();

int count = 0;

       Scanner in = new Scanner(new File("Employee.dat"));
       while (in.hasNext())
       {
           //Sample Strings
           //"Mike Dumas               $44.00/hour"
           //"Susan Stroupe           $44000.00/year"
           String line = in.nextLine();
           String emp_name = line.substring(0,(line.indexOf("$"))).trim();
           Double payrate = Double.parseDouble( line.substring((line.indexOf("$")+1),line.indexOf("/")) );

           if(line.endsWith("hour"))       //if true its a hourly employee
           {database.add(new HourlyEmployee(emp_name,payrate));
               count++;}
           if(line.endsWith("year"))       //if true its a salaried employee
           {database.add(new SalariedEmployee(emp_name,payrate));
               count++;}

}

System.out.println("Successfully Uploaded "+count+" Employees Press Enter to Continue...");
stdin.nextLine();

   }


}

SalariedEmployee.java

import java.text.*;
public class SalariedEmployee extends Employee
{

public SalariedEmployee(String name, double AnnualSal)
{super( name,( AnnualSal/(52*40) ) ); }

public double getAnnualSal()
{return super.getWage()*40*52; }

public void setAnnualSal(double AnnualSal)
{super.setWage( AnnualSal/(52*40) ); }

   public double computePay(int hrs) //return 1/52 of annual salary regardless of hrs worked
       {return getAnnualSal()/52;           }

   public String getName()
   { return super.getName(); }

   public String toString()
       {   DecimalFormat fix = new DecimalFormat("0.00");
           return super.getName()+" $"+fix.format(getAnnualSal())+"/year ";}

}

Hourly (h) or salaried (s): h

Enter hourly wage: 300
Press Enter to continue...

Hourly (h) or salaried (s): s

Enter Annual Salary: 200000
Press Enter to continue...

Enter number of hours worked by jaya:68
Pay: $24600.00

Enter number of hours worked by kumari:8
Pay: $3846.15

Press Enter to continue...

New Wages
_________
jaya $315.00/hour
kumari $210000.00/year
Press Enter to continue...

Press Enter to continue...

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