Scanner Keyboard Accepting a blank

[Aycex]

I am taking my first java class as i am a Database person this is quite interesting and here is my problem.

We are supposed to be learning to overload a class and i believe i have my code correct the problem is I cannot get the keyboard.nextdo uble to accept me hitting enter and it having a null to make my overloaded method work.

Here is the code i have.

I am supposed to be able to just add in one, two, or three variables and the methods fire off accordingly.

import java.util.Scanner;
public class Pay
{
   public static void main(String[] args)
{
/*Declaration of variables*/
    double hoursworked;
	 double payrate;
	 double withholdingrate;
	 double grosspay;
	 double netpay;
	 
/*This lets the user enter a numer*/	 
	 Scanner keyBoard = new Scanner(System.in);
	 System.out.print("Please enter the hours you have worked.");
	 hoursworked = keyBoard.nextDouble();
    System.out.print("Please enter your rate of pay.");
	 payrate = keyBoard.nextDouble();
    System.out.print("Please enter your withholding rate as a decimal.");
	 withholdingrate = keyBoard.nextDouble();



/*This calls the computenetpay and displays the value*/

	computenetpay(hoursworked, payrate, withholdingrate);
}
/*This is a new class to calculate gross and net pay*/
public static void computenetpay(double hoursworked, double payrate, double withholdingrate)
{
	double grosspay;
   double netpay;

	grosspay = (hoursworked * payrate);
	netpay = grosspay - (grosspay * withholdingrate);

   System.out.println   ("Your gross pay is " + (grosspay) + ".");	
	System.out.println   ("Your net pay is " + (netpay) + ".");


}

public static void computenetpay(double hoursworked, double payrate)
{
	double grosspay;
   double netpay;

	grosspay = (hoursworked * payrate);
	netpay = grosspay - (grosspay * 0.15);

   System.out.println   ("Your gross pay is " + (grosspay) + ".");	
	System.out.println   ("Your net pay is " + (netpay) + ".");


}

public static void computenetpay(double hoursworked)
{
	double grosspay;
   double netpay;

	grosspay = (hoursworked * 5.85);
	netpay = grosspay - (grosspay * 0.15);

   System.out.println   ("Your gross pay is " + (grosspay) + ".");	
	System.out.println   ("Your net pay is " + (netpay) + ".");

}
	
}

[Markus]

I imagine that the problem is this line:

computenetpay(hoursworked, payrate, withholdingrate);

You will *always* be calling the method that accepts 3 doubles, even if any of them do not have a value to work with.

You need to check that the values are present and call the relevant method.

double x, y, z;

/** get input */
if x, y, z not null then
    func(x, y, z)
else if x, y not null then
    func(x, y)
else if x not null then
    func(x)
else
    /** no values give */
    explode()
endif

Mark.

P.S. Please wrap code with [code] code goes here [/code] - as per the forum guidelines. Thanks :)