Static Methods

I am using a staitc method to call a class named Validator. I want to keep using the static method(since it is a requirement of the project) but I am getting the following errors off of my Validator class:

Validator.java:9: cannot find symbol

symbol : variable userEntry

location: class Validator

userEntry = Double.parseDouble(dataEntry);

^

Validator.java:10: cannot find symbol

symbol : variable userEntry

location: class Validator

if (userEntry > 100.00 || userEntry < 0.0)

^

Validator.java:10: cannot find symbol

symbol : variable userEntry

location: class Validator

if (userEntry > 100.00 || userEntry < 0.0)

^

Validator.java:18: cannot find symbol

symbol : variable strthirdMessage

location: class Validator

dataEntry = JOptionPane.showInputDialog(strthirdMessage, JOptionPane.ERROR_MESSAGE);

^

Validator.java:18: cannot find symbol

symbol : variable JOptionPane

location: class Validator

dataEntry = JOptionPane.showInputDialog(strthirdMessage, JOptionPane.ERROR_MESSAGE);

^

Validator.java:18: cannot find symbol

symbol : variable JOptionPane

location: class Validator

dataEntry = JOptionPane.showInputDialog(strthirdMessage, JOptionPane.ERROR_MESSAGE);

^

Validator.java:21: incompatible types

found: java.lang.String

required: double

return dataEntry;

^

Here is the validator class

publicclass Validator

{

publicstaticdouble getIsValid(String dataEntry)

{

while (!dataEntry.equalsIgnoreCase("x"))

{

try

{

userEntry = Double.parseDouble(dataEntry);

if (userEntry > 100.00 || userEntry < 0.0)

{

thrownew Exception();

}

}

catch (Exception e)

{

String thirdMessage = ("Invalid entry. Please enter valid data");

dataEntry = JOptionPane.showInputDialog(strthirdMessage,""+JOptionPane.ERROR_MESSAGE);

}

}

return dataEntry;

}

}

And here is the main method

[code]

//Thomas Tate

//Project 2 -GUI

import javax.swing.*;

import java.util.*;

import java.lang.*;

publicclass GUIGradeApp

{

publicstaticvoid main(String[] args)

{

//defines variables

double userEntry = 0;

String dataEntry ="tyt";

double gradeTotal = 0;

double highest = 0;

double lowest = 99999.0;

double gradeAverage = 0;

int gradeCount = 0;

String letterGrade ="";

//gets input from the user

String strFirstMessage = ("Please enter a test score");

dataEntry = JOptionPane.showInputDialog(strFirstMessage,""+JOptionPane.ERROR_MESSAGE);

double something = Validator.getIsValid(dataEntry);

gradeTotal = gradeTotal + userEntry;

gradeCount = gradeCount + 1;

highest = Math.max(highest, userEntry);

lowest = Math.min(lowest, userEntry);

String strSecondMessage = ("Please enter a test score,\n or 'x' to view data results.");

dataEntry = JOptionPane.showInputDialog(strSecondMessage,""+JOptionPane.ERROR_MESSAGE);

//creates letter grade

gradeAverage = gradeTotal / gradeCount;

if (gradeAverage <= 89.5 || gradeAverage >= 100.00)

letterGrade ="A";

elseif (gradeAverage <= 79.5 || gradeAverage > 89.5)

letterGrade ="B";

elseif (gradeAverage <= 69.5 || gradeAverage > 79.5)

letterGrade ="C";

elseif (gradeAverage <= 59.5 || gradeAverage > 69.5)

letterGrade ="D";

else

letterGrade ="F";

String strThirdMessage ="Number of scores: " + gradeCount +"\n"

+"Average score: " + gradeAverage +"\n"

+"Letter Grade: " + letterGrade +"\n"

+"Best score: " + highest +"\n"

+"Press enter to continue entering scores,\nor 'x' to exit.";

JOptionPane.showInputDialog(strThirdMessage,""+JOptionPane.ERROR_MESSAGE);

}

}

[6434 byte] By [TY_Whiteya] at [2007-11-27 2:31:23]