Question

JAVA

Specify, design, and implement a class called PayCalculator. The class should have at least the following instance variables:

• employee’s name

• reportID: this should be unique. The first reportID must have a value of 1000 and for each new reportID you should increment by 10.

• hourly wage

Include a suitable collection of constructors, mutator methods, accessor methods, and toString method. Also, add methods to perform the following tasks:

1. Compute yearly salary - both the gross pay and net pay

2. Increase the salary by a certain percentage

3. Compute pay check net pay for a given pay period (there are 26 pay periods per year). Here is what you have to consider when computing the net pay:

   1. Federal Tax deductions – 9%

   2. State Tax deductions – 2%

   3. Overtime - number of hours worked over the 80hrs full time load. Here is how you can calculate the overtime pay rate

overTimePay = regularPayRate * 1.5

4. Compute pay check net pay for all pay periods (all 26 pay periods)

Answer 1

////////////////////PayCalculator.java//////////////////

package test.pay;

import java.text.DecimalFormat;
import java.util.Random;

public class PayCalculator {
   private static int reportIdGenerator = 1000;
   private String employeeName;
   private int reportId;
   private double hourlyWage;
   private int[] overtimes = null;
          
   private static final int TOTAL_PAY_PERIOD = 26;
   private static final double FEDERAL_TAX = 0.09; //9%
   private static final double STATE_TAX = 0.02; //2%
   private static final double FULL_TIME_LOAD = 80; //80 hours
   private static final double OVERTIME_PAY_FACTOR = 1.5; //1.5 times of regular pay
  
  
   public PayCalculator(){
       this.reportId = reportIdGenerator;
       reportIdGenerator+=10;
       this.overtimes = generateOvertimes();
   }
  
   public PayCalculator(String name,double hourlyWage){
       this.reportId = reportIdGenerator;
       reportIdGenerator+=10;
       this.employeeName = name;
       this.hourlyWage = hourlyWage;
       this.overtimes = generateOvertimes();
   }

   public String getEmployeeName() {
       return employeeName;
   }

   public void setEmployeeName(String employeeName) {
       this.employeeName = employeeName;
   }

   public int getReportId() {
       return reportId;
   }

   public double getHourlyWage() {
       return hourlyWage;
   }

   public void setHourlyWage(double hourlyWage) {
       this.hourlyWage = hourlyWage;
   }
  
  
   @Override
   public String toString() {
       return "PayCalculator [employeeName=" + employeeName + ", reportId=" + reportId + ", hourlyWage=" + hourlyWage
               + "]";
   }
  
   /**
   * calculateYearlyGrossPay
   * @return
   */
   public double calculateYearlyGrossPay(){
       double totalGross = 0.0;  
       for(int period = 1; period <= TOTAL_PAY_PERIOD; period++){
           totalGross += calculateGrossForPeriod(period);
       }  
       return totalGross;
   }
  
   /**
   * calculateYerlyNetPay
   * @return
   */
   public double calculateYerlyNetPay(){
       double totalNet = 0.0;  
       for(int period = 1; period <= TOTAL_PAY_PERIOD; period++){
           totalNet += calculateNetPayForPeriod(period);
       }
       return totalNet;
   }
  
   /**
   * calculateNetPayForPeriod : calculate net pay for given period number
   * @return
   */
   public double calculateNetPayForPeriod(int periodNumber){
       double gross = calculateGrossForPeriod(periodNumber);
       double tax = calculateTax(gross);
       double netPay = gross-tax;
       return netPay;  
   }
  
   /**
   * print net pay for all 26 periods
   */
   public void printNetPayForAllPeriods(){
       DecimalFormat df = new DecimalFormat("#.00");
       System.out.println("NET PAY for all periods:\n");
       for(int period =1; period <= TOTAL_PAY_PERIOD; period++){
           System.out.println("PERIOD:"+period+" NET PAY:"+df.format(calculateNetPayForPeriod(period)));
       }
   }
  
   /**
   * increase hoourly wage by certain percentage%
   * @param percentage
   */
   public void increaseWageRate(double percentage){
       hourlyWage =hourlyWage+ hourlyWage*(percentage/100);
   }
  
   private double calculateGrossForPeriod(int periodNumber){
       double regulayPay = FULL_TIME_LOAD*hourlyWage;
       double overtimePay = overtimes[periodNumber-1]*(hourlyWage*OVERTIME_PAY_FACTOR);
       double gross= regulayPay+overtimePay;
       return gross;
   }
  
   private double calculateTax(double gross){
       double federalTax = gross*FEDERAL_TAX;
       double stateTax = gross*STATE_TAX;
       return federalTax+stateTax;
   }
  
   /**
   * generate random overtime hours between 0 to 15 for 26 pay periods
   * @return
   */
   private int[] generateOvertimes(){
       int[] overtimes = new int[TOTAL_PAY_PERIOD];
       for(int i = 0; i < overtimes.length; i++){
           //will generate overtime between 0 to 15
           overtimes[i] = (int)(Math.random()*16);
       }
      
       return overtimes;
   }
  
}

/////////////////////////TestPay.java//////////////////////////

package test.pay;

import java.text.DecimalFormat;

public class TestPay {
  
   public static void main(String[] args){
       DecimalFormat df = new DecimalFormat("#.00");
       System.out.println("----------------------------------------------------");
       PayCalculator p1 = new PayCalculator();
       p1.setEmployeeName("Henry Brown");
       p1.setHourlyWage(9.8);
      
       System.out.println(p1);
       System.out.println("Yerly gross pay: "+ df.format(p1.calculateYearlyGrossPay()));
       System.out.println("Yerly Net pay: "+ df.format(p1.calculateYerlyNetPay()));
       System.out.println("Net Pay for period 5 is:"+ df.format(p1.calculateNetPayForPeriod(5)));
       p1.printNetPayForAllPeriods();
      
       System.out.println("----------------------------------------------------");
       PayCalculator p2 = new PayCalculator("Thomas Hilly",7.60);
       System.out.println(p2);
      
       System.out.println("Yerly gross pay: "+ df.format(p2.calculateYearlyGrossPay()));
       System.out.println("Yerly Net pay: "+ df.format(p2.calculateYerlyNetPay()));
       System.out.println("Net Pay for period 12 is:"+ df.format(p2.calculateNetPayForPeriod(12)));
       p2.printNetPayForAllPeriods();
      
       p2.increaseWageRate(12); //increase hourly wage by 12%
       System.out.println("New wage for "+p2.getEmployeeName()+" is: "+ p2.getHourlyWage());
       p2.printNetPayForAllPeriods();
      
      
       System.out.println("----------------------------------------------------");
       PayCalculator p3 = new PayCalculator("Samuel Johnson",9);
       System.out.println(p3);
       System.out.println("Yerly gross pay: "+ df.format(p3.calculateYearlyGrossPay()));
       System.out.println("Yerly Net pay: "+ df.format(p3.calculateYerlyNetPay()));
       System.out.println("Net Pay for period 21 is:"+ df.format(p3.calculateNetPayForPeriod(21)));
      
   }

}

============================

OUTPUT

===========================

----------------------------------------------------
PayCalculator [employeeName=Henry Brown, reportId=1000, hourlyWage=9.8]
Yerly gross pay: 23897.30
Yerly Net pay: 21268.60
Net Pay for period 5 is:723.93
NET PAY for all periods:

PERIOD:1 NET PAY:894.00
PERIOD:2 NET PAY:802.42
PERIOD:3 NET PAY:828.59
PERIOD:4 NET PAY:867.84
PERIOD:5 NET PAY:723.93
PERIOD:6 NET PAY:894.00
PERIOD:7 NET PAY:854.76
PERIOD:8 NET PAY:789.34
PERIOD:9 NET PAY:894.00
PERIOD:10 NET PAY:880.92
PERIOD:11 NET PAY:841.67
PERIOD:12 NET PAY:789.34
PERIOD:13 NET PAY:880.92
PERIOD:14 NET PAY:854.76
PERIOD:15 NET PAY:828.59
PERIOD:16 NET PAY:723.93
PERIOD:17 NET PAY:750.09
PERIOD:18 NET PAY:697.76
PERIOD:19 NET PAY:737.01
PERIOD:20 NET PAY:750.09
PERIOD:21 NET PAY:815.51
PERIOD:22 NET PAY:894.00
PERIOD:23 NET PAY:815.51
PERIOD:24 NET PAY:776.26
PERIOD:25 NET PAY:828.59
PERIOD:26 NET PAY:854.76
----------------------------------------------------
PayCalculator [employeeName=Thomas Hilly, reportId=1010, hourlyWage=7.6]
Yerly gross pay: 18110.80
Yerly Net pay: 16118.61
Net Pay for period 12 is:622.29
NET PAY for all periods:

PERIOD:1 NET PAY:541.12
PERIOD:2 NET PAY:662.87
PERIOD:3 NET PAY:591.85
PERIOD:4 NET PAY:561.41
PERIOD:5 NET PAY:632.43
PERIOD:6 NET PAY:551.27
PERIOD:7 NET PAY:612.14
PERIOD:8 NET PAY:683.16
PERIOD:9 NET PAY:673.02
PERIOD:10 NET PAY:642.58
PERIOD:11 NET PAY:622.29
PERIOD:12 NET PAY:622.29
PERIOD:13 NET PAY:561.41
PERIOD:14 NET PAY:693.31
PERIOD:15 NET PAY:612.14
PERIOD:16 NET PAY:652.73
PERIOD:17 NET PAY:571.56
PERIOD:18 NET PAY:622.29
PERIOD:19 NET PAY:662.87
PERIOD:20 NET PAY:673.02
PERIOD:21 NET PAY:632.43
PERIOD:22 NET PAY:673.02
PERIOD:23 NET PAY:591.85
PERIOD:24 NET PAY:602.00
PERIOD:25 NET PAY:561.41
PERIOD:26 NET PAY:612.14
New wage for Thomas Hilly is: 8.512
NET PAY for all periods:

PERIOD:1 NET PAY:606.05
PERIOD:2 NET PAY:742.42
PERIOD:3 NET PAY:662.87
PERIOD:4 NET PAY:628.78
PERIOD:5 NET PAY:708.33
PERIOD:6 NET PAY:617.42
PERIOD:7 NET PAY:685.60
PERIOD:8 NET PAY:765.14
PERIOD:9 NET PAY:753.78
PERIOD:10 NET PAY:719.69
PERIOD:11 NET PAY:696.96
PERIOD:12 NET PAY:696.96
PERIOD:13 NET PAY:628.78
PERIOD:14 NET PAY:776.51
PERIOD:15 NET PAY:685.60
PERIOD:16 NET PAY:731.05
PERIOD:17 NET PAY:640.14
PERIOD:18 NET PAY:696.96
PERIOD:19 NET PAY:742.42
PERIOD:20 NET PAY:753.78
PERIOD:21 NET PAY:708.33
PERIOD:22 NET PAY:753.78
PERIOD:23 NET PAY:662.87
PERIOD:24 NET PAY:674.24
PERIOD:25 NET PAY:628.78
PERIOD:26 NET PAY:685.60
----------------------------------------------------
PayCalculator [employeeName=Samuel Johnson, reportId=1020, hourlyWage=9.0]
Yerly gross pay: 21312.00
Yerly Net pay: 18967.68
Net Pay for period 21 is:724.90