Input Mismatch Exception error

Question

I'm getting a input mismatch error but I'm not sure why. It was working on a different computer but it seems to not be working on my laptop.At first I thought it might be my txt file but that was not the reason.

import java.io.*;
import java.util.*;
public class FindGrade {
public static final int NUM_SCORE_TYPES = 5;   

public static void main(String[] args) {
    Scanner scan = null;
    int[] quizArray = null;    
    int[] labArray = null;     
    int[] attendance = null; 
    int[] midterms = null; 
    int quizgrade =0;
    int labgrade=0;
    int attendance_1=0;
    int midterms_1 =0;
    String name;


    try {
        scan = new Scanner(new File("input.txt")); 
    } catch (FileNotFoundException e) {
        e.printStackTrace();
        return;
    }

    // each iteration is for single exam type (ie: Quizzes is the 1st one)
    for (int i = 0; i < NUM_SCORE_TYPES; i++) {

        name = scan.next(); 
        int numScores = scan.nextInt();
        int maxGrade = scan.nextInt();

        if (name.equals("Quizzes")) {
            quizArray = new int[numScores];
            readScores(quizArray, numScores, scan);


        }

        else if (name.equals("Labs")) {
            labArray = new int[numScores];
            readScores(labArray, numScores, scan);

        }
        else if (name.equals("Lab_attendance")) {
            attendance = new int[numScores];
            readScores(attendance, numScores, scan);

        }
        else if (name.equals("Midterms")) {
            midterms = new int[numScores];
            readScores(midterms, numScores, scan);

        }

    }

}


public static void readScores(int[] scoreArray, int numScores, Scanner scan) {
    for (int i = 0; i < numScores; i++) { 
        scoreArray[i] = scan.nextInt();
    }
}

public static void average(double [] scoreArray, int numScores){
    double sum=0;
    for(int i=0; i< scoreArray.length; i++){
        sum += scoreArray[i];
    }
    double average = sum/numScores;

    System.out.println(sum + " " + average);



}

}

output:

Exception in thread "main" java.util.InputMismatchException
    at java.util.Scanner.throwFor(Scanner.java:840)
    at java.util.Scanner.next(Scanner.java:1461)
    at java.util.Scanner.nextInt(Scanner.java:2091)
    at java.util.Scanner.nextInt(Scanner.java:2050)
    at FindGrade.main(FindGrade.java:33)

input file:

Quizzes 8 10
5 8 9 10 4 0 10 7
Labs 6  100
95  90  100  87  63  92
Lab_attendance  16  1
1  1  1  0  1  1  1  1  0  1  1  1  1  0  1  1
Midterms  2  100
87  94
Final  0  100

Seems like what your `Scanner` is reading from the text file is either not an `int` or too large to be stored into `int`. Can you place a sample input file here? — Akshat Singhal, Feb 06 '14 at 04:25
did you refer this Question for your problem http://stackoverflow.com/questions/14027537/input-mismatch-exception?rq=1 — Sankar Ganesh PMP, Feb 06 '14 at 04:26
I doubt this "name = scan.next(); " and "if (name.equals("Quizzes"))" let me check — Suganthan Madhavan Pillai, Feb 06 '14 at 04:27

score 0 · Answer 1 · answered Feb 06 '14 at 05:14

Your code is working fine with the data that you posted. It will give this error if variable "name" will be assigned value different from 5 names that you are expecting, like "Quizze" instead of "Quizzes". In that case your code logic gets corrupted and you will have this error. This is one possible root cause.

Input Mismatch Exception error

1 Answers1