If-then conversion of textfields for calc

[Douglas TerBush]

Here is the problem:
I have to convert information inputted into a textField to a variable format for calculations. I have to have error correction to ensure that information is inputted for each field. Further, I have two buttons and the problem is arrising in the calcButton section. I attempted to do this problem this way:
1st) Convert the three textField objects to String, and a double and double value.
2nd) Ran a test to ensure that the data in the variables contained information, if not give the appropriate error message.
3rd) Did the Calculations.
The problem is that the program attempts to convert empty information to a string or double without testing it first and I get errors.
I'm having a devil of a time nesting this dang thing properly. I know the problem is in the nesting of the if-else if statements and I can't see the code to fix it. Here is the example code, any suggestions?

public void actionPerformed (ActionEvent e)
      {
        if(e.getSource().equals(calcButton))
        {
          //Get the employee name from the empNameField and convert
          //it to a string.
          String empName = empNameField.getText();
          //Get the hours worked from the hoursWorkedField and convert
          //it to a double value.
          double hoursWorked = new Double(hoursWorkedField.getText().trim()).doubleValue();
          //Get the pay rate from the payRateField and convert
          //it to a double value.
          double payRate = new Double(payRateField.getText().trim()).doubleValue();

          if(empNameField.getText().length() == 0)
            {
              text.setText("Must enter a name.");
            }
          else if(hoursWorked < 0)
            {
              text.setText("Must enter hours worked equal" + "\n" + "to or greater than zero.");
            }
          else if(payRate <= 5.14)
            {
              text.setText("Pay Rate must be $5.15 or more.");
            }
          else if(exemptStatus == false && hoursWorked > 40)
            {
              //Calculates the overtime pay and displays Employee Information
              double overtimePayDisplay = ((hoursWorked-40) * payRate * OVERTIME) + (40 * payRate);
                text.setText("Employee Name: " + empName
              + "\n" + "Hours Worked: " + hoursWorked
              + "\n" + "Pay Rate: " + Utility.moneyFormat(payRate)
              + "\n" + "Gross Pay: " + Utility.moneyFormat(overtimePayDisplay));
            }
          else
            {
              //Calculate the regular pay and Display Employee Information.
              double PayDisplay = (hoursWorked * payRate);
                text.setText("Employee Name: " + empName
              + "\n" + "Hours Worked: " + hoursWorked
              + "\n" + "Pay Rate: " + Utility.moneyFormat(payRate)
              + "\n" + "Gross Pay: " + Utility.moneyFormat(PayDisplay));
            }
        }
        else
        {
          e.getSource().equals(clearButton);
          //Set empNameField to empty.
          empNameField.setText("");
          //Set hoursWorkedField to empty.
          hoursWorkedField.setText("");
          //Set payRateField to empty
          payRateField.setText("");
          //Set the TextArea to empty
          text.setText("");
          //Set the Checkbox to non-selected
          exempt.setState(false);
          //Sets the Choicebox to manufacturing
          departmentChoice.select(0);
        }
      }

[ edited to preserve formatting using the [code] and [/code] UBB tags -ds ]
[ October 01, 2002: Message edited by: Dirk Schreckmann ]

[Dirk Schreckmann]

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[Priya Mahale]

Hi,
If the hoursWorked textfield is empty and u try to convert it into a double value then
double hoursWorked = new Double(hoursWorkedField.getText().trim()).doubleValue()
will definitely give u an exception..
Why dont u check whether the text fields r empty first??
If they r empty then give the appropriate error msg and if they r not empty then u can convert them to a double value.
i.e.,
String name = empNameField.getText();
String hrs = hoursWorkedField.getText;
and similarly for the 3rd text field.
if(name.length() == 0 )
{
// err msg;
}
if(hrs.length() == 0)
{
// err msg;
}
else
{
new Double(hoursWorkedField.getText().trim()).doubleValue();
}
and so on..
I really havent ran ur code and seen it so maybe what i have told might not be sufficient enough to debug ur code completely..
Anyway, hope this helps u