Thread: What's wrong with my code?

My code's not working and I don't know why. I'm trying to read numerical values from a file and saving all instances where a letter is entered instead of a number to a string to be referenced as an error at a later point on in the code. However, there's an error and like I've stated before, I don't know what caused it.

     public static void validateData() throws IOException{
                File myfile = new File("gradeInput.txt");
                Scanner inputFile = new Scanner(myfile);
                for (int i=0; i<33; i++){
                        if(inputFile.hasNextDouble()){
                                double d = inputFile.nextDouble();
                                if (d<0||d>99999){
                                        System.out.println("Not a valid ID.");
                                        System.exit(0);
                                }
                        }
                        else{
                        String s = inputFile.next();
                        }
                        String extraCredit = inputFile.next();
                        String toBeDoubleOne = extraCredit;
                        Double fromStringOne = new Double(toBeDoubleOne);
                        if (fromStringOne<0||fromStringOne>5){
                                double error1 = fromStringOne;
                        }
                        String grade = inputFile.next();
                        String toBeDoubleTwo = grade;
                        Double fromStringTwo = new Double(toBeDoubleTwo);
                        if (fromStringTwo<0||fromStringTwo>100.00){
                                double error2 = fromStringTwo;
                        }
 
                }
                inputFile.close();
        }

This is the error that returns.

    Exception in thread "main" java.util.NoSuchElementException
        at java.util.Scanner.throwFor(Scanner.java:838)
        at java.util.Scanner.next(Scanner.java:1347)
        at Paniagua_Grading.validateData(Paniagua_Grading.java:29)
        at Paniagua_Grading.main(Paniagua_Grading.java:6)

Thanks in advance!

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My code's not working

Please explain.

Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Scanner.java:838)
at java.util.Scanner.next(Scanner.java:1347)
at Paniagua_Grading.validateData(Paniagua_Grading.jav a:29)

The program calls the next() method on line 29 when the isn't any more data to read.
The Scanner class has a method that will test if there is more data so that the program can test for this condition and keep this error from happening.

I don't know about the while() statement, but the hasNext() looks right.