I think I'm stuck!!

[mike statham]

Program will not print anything, and only error is
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:909)
at java.util.Scanner.next(Scanner.java:1530)
at java.util.Scanner.nextInt(Scanner.java:2160)
at java.util.Scanner.nextInt(Scanner.java:2119)
at StudentGrades.getAverage(StudentGrades.java:37)
at StudentGrades.main(StudentGrades.java:109)

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.Scanner;



public class StudentGrades {



//Declare variables and make the total test a constant equal to 3, since there are 3 tests
private static double TOTAL_TESTS = 3;


    private static double average;
    private static char grade;

    //Use an array to store the 5 test scores
    private static int[] testScore = new int[3];

    private static String name;
    public StudentGrades() {


        //initialize the average, grade and name to zero,empty and null
        average = 0;

        grade = ' ';

        name="null";
    }

    public static void getAverage(Scanner inFile) {
    //create local variable to store temporary average in
    int tempAverage = 0;
    for (int num = 0; num <=3; num++) {
    testScore[num] = inFile.nextInt();
    
    
   //Add all the scores together per student
   tempAverage = testScore[num] + tempAverage;
   
   
   
   
   
   //Divide the average by the total amount of tests(5)
   average= (double)tempAverage / (TOTAL_TESTS);
             
        }


    }

    public char calculateGrade(Scanner inFile) {

        //Assign a grade to the appropriate numerical value 


        //A=90-100 B=80-89 C=70-79 D=60-69 F=Below 60

        if (average <= 100 && average >= 90) {


            grade = 'A';
        } else if (average < 90 && average >= 80) {

            grade = 'B';


        } else if (average < 80 && average >= 70) {
            grade = 'C';


        } else if (average < 70 && average >= 60) {

            grade = 'D';


        } else {

            grade = 'F';


        }

        //Return the appropriate grade 
        return grade;

    }


    public static void main(String[] args) throws FileNotFoundException {

//Open the file that you are reading the information from
        try (Scanner inFile = new Scanner(new FileReader("grades.txt"))) {
            StudentGrades averages = new StudentGrades();


    //Read the input file until there is no text
            while (inFile.hasNext()) {

    // get the name of the student

                name = inFile.next();

    // get the name of the student

            StudentGrades.getAverage(inFile);

    //Calculate the average
                grade = averages.calculateGrade(inFile);


    //Output each students name, test scores, average numerical grade and letter grade

                System.out.printf("%s", name);

                for (int num = 0; num <= 4; num++) {
                    System.out.printf("%d%%", testScore[num]);

                }

             
                System.out.printf("%d%% ", average);

                System.out.printf(" %s", grade);

                System.out.println();

            }
        }

    }


}

[Matthew Brown]

If you follow the link the forum software has put in for java.util.InputMismatchException, it will take you to the documentation. Which says "Thrown by a Scanner to indicate that the token retrieved does not match the pattern for the expected type, or that the token is out of range for the expected type."

You're getting it thrown on line 37, which is testScore[num] = inFile.nextInt(); This means that the next thing that's being read by the Scanner isn't an integer. So, what is it? It's all to do with what's in your input file. What is it trying to read at this point?