Thread: I am having trouble getting my program to return Withholding Tax (keeps returing zero).

hi
I have to set an instance variable but just don't know where.Attached is my class with Methods and my Test Class . Any help would be great.
Methods:

public class Payroll
{
	//constants
	private static final double REG_HOURS = 40;
	private static final double OT_RATE = 1.5;
	//Variables
	private int IDnumber;
	private double HourlyPayRate;
	private double HoursWorked;
	private double TaxWitholding;
	private double GrossPay;
	private double grossPay;
	/**
		Constructor
 
		@param ID The ID to store in Employee ID number.
	*/
	public Payroll( int ID)
	{
 
		IDnumber = ID;
 
	}
	public int getIDnumber()
	{
		return IDnumber;
	}
	public void setHourlyPayRate(double HourlyRate)
	{
		HourlyPayRate = HourlyRate;
	}
	public double getHourlyPayRate()
	{
		return HourlyPayRate;
	}
	public void setHoursWorked(double hoursWorked)
	{
		HoursWorked = hoursWorked;
	}
	public double getHoursWorked()
	{
		return HoursWorked;
	}
	public double getGrossPay()
	{
		if (HoursWorked <=REG_HOURS){
			double grossPay =HourlyPayRate * HoursWorked;
			return grossPay;
		}
		else{
			double regPay =REG_HOURS * HourlyPayRate;
			double otPay = (HoursWorked - REG_HOURS) * OT_RATE * HourlyPayRate;
			double grossPay = (regPay + otPay);
			return grossPay;
		}
	}
		public void setgrossPay(double grossPay)
	{
			GrossPay =grossPay;
	}
		public double getTaxWitholding()
	{
		if (GrossPay <= 300.00){
				TaxWitholding = .10 * GrossPay;
		}
		else if (GrossPay <= 400.00){
			TaxWitholding = .12 * GrossPay;}
		else if (GrossPay <= 500.00){
			TaxWitholding = .15 * GrossPay;}
		else if (GrossPay > 500.01){
			TaxWitholding = .20 * GrossPay;}
		return TaxWitholding;
}
}

Test Class

import java.util.Scanner;	//Needed for Scanner class.
 
public class PayrollTest
{
	public static void main(String[] args)
	{
 
		int IDnumber = 0;
		double HoursWorked=0;
		double HourlyPayRate=0;
		double GrossPay = 0;
 
		//Create a Scanner object for keyboard input.
		Scanner in = new Scanner(System.in);
 
		//Create a payroll object, IDnumber
		// as arguments to the constructor.
		Payroll pay = new Payroll(IDnumber);
 
 
		//Get the employee's ID.
		System.out.println("Enter the employee's ID " );
		IDnumber = in.nextInt();
 
		//Get the number of hours worked by the employee.
		System.out.println("Enter the number of hours worked: ");
		HoursWorked= in.nextDouble();
		pay.setHoursWorked(HoursWorked);
		while(pay.getHoursWorked()<=0)
		{
			System.out.print("Please enter a number >0. Try Again.");  
 
			        pay.setHoursWorked(in.nextDouble());  
		}  
		//Get the hourly pay rate of the employee.
		System.out.println("Enter the hourly pay rate for this employee: ");
		HourlyPayRate = in.nextDouble();
		pay.setHourlyPayRate(HourlyPayRate);
		while(pay.getHourlyPayRate()<=0)
		{
			System.out.print("Please enter a number >0. Try Again.");  
 
			        pay.setHourlyPayRate(in.nextDouble());  
		} 
 
		//Get the Gross Pay of the employee.
		System.out.println("The gross pay for " + IDnumber + " is: " + pay.getGrossPay());
 
		//Get the Gross Pay of the employee.  
 
		System.out.println("The gross pay for " + IDnumber + " is: ");
				pay.setgrossPay(GrossPay);
				pay.getTaxWitholding();
 
		     }  
 
		 }

Any help would be great

Ok the gross pay works. It is the Withholding tax that returns zero.
Here is my output
Enter the employee's ID
123
Enter the number of hours worked:
22
Enter the hourly pay rate for this employee:
20
The gross pay for 123 is: 440.0
The Withholding Tax for 123 is:

\}
	public double getGrossPay()
	{
		if (HoursWorked <=REG_HOURS){
			double grossPay =HourlyPayRate * HoursWorked;
			return grossPay;
		}
		else{
			double regPay =REG_HOURS * HourlyPayRate;
			double otPay = (HoursWorked - REG_HOURS) * OT_RATE * HourlyPayRate;
			double grossPay = (regPay + otPay);
			return grossPay;
		}
	}
		public void setgrossPay(double grossPay)
	{
			GrossPay =grossPay;
	}
		public double getTaxWitholding()
	{
		if (GrossPay <= 300.00){
				TaxWitholding = .10 * GrossPay;
		}
		else if (GrossPay <= 400.00){
			TaxWitholding = .12 * GrossPay;}
		else if (GrossPay <= 500.00){
			TaxWitholding = .15 * GrossPay;}
		else if (GrossPay > 500.01){
			TaxWitholding = .20 * GrossPay;}
		return TaxWitholding;

This call the Method

//Get the Gross Pay of the employee.
		System.out.println("The gross pay for " + IDnumber + " is: " + pay.getGrossPay());
 
//Get the Withholding Tax of the employee.  
 
		System.out.println("The Withholding Tax for " + IDnumber + " is: ");
				pay.setgrossPay(GrossPay);
				pay.getTaxWitholding();

Don't I call it here

//Get the Withholding Tax of the employee.

System.out.println("The Withholding Tax for " + IDnumber + " is: ");
pay.setgrossPay(GrossPay);
pay.getTaxWitholding();

ok..I am getting there. It at least returns 0.0 Now I just have to see why it's not getting the value

Here is my return
Enter the employee's ID
55
Enter the number of hours worked:
12
Enter the hourly pay rate for this employee:
10
The gross pay for 55 is: 120.0
The Withholding Tax for 55 is: 0.0

--- Update ---

So it has to be somewhere in here

public double getGrossPay()
	{
		if (HoursWorked <=REG_HOURS){
			 grossPay =HourlyPayRate * HoursWorked;
			return grossPay;
		}
		else{
			double regPay =REG_HOURS * HourlyPayRate;
			double otPay = (HoursWorked - REG_HOURS) * OT_RATE * HourlyPayRate;
			 grossPay = (regPay + otPay);
			return grossPay;
		}
	}
		public void setGrossPay( double grossPay)
	{
			GrossPay =grossPay;
	}
		public double getTaxWitholding()
	{
		if (GrossPay <= 300.00){
				TaxWitholding = .10 * GrossPay;
		}
		else if (GrossPay <= 400.00){
			TaxWitholding = .12 * GrossPay;}
		else if (GrossPay <= 500.00){
			TaxWitholding = .15 * GrossPay;}
		else if (GrossPay > 500.01){
			TaxWitholding = .20 * GrossPay;}
		return TaxWitholding;
}

Thank so kmuch. Finally got it.
Enter the employee's ID
555
Enter the number of hours worked:
40
Enter the hourly pay rate for this employee:
20
The gross pay for 555 is: 800.0
The Withholding Tax for 555 is: 160.0