FileScan and Scanner issue! HELP

[Solved]FileScan and Scanner issue! HELP

So, I keep getting a java.util.InputMismatchException null(in java.util.Scanner). I have used the same logic in a different program with a list of integers. This program takes from a list of numbers from 1-2000. I've made sure that "integers.txt" is an actual text file in the project. I am using BlueJ to code this. Can anyone shed some light on this?

Code :

import java.util.Scanner;
import java.io.*;
 
public class Sorting
{
    private static int[] a = new int[2000];
    private int v;
    private Scanner fileScan, dataScan;
    private static String oneLine;
    public Sorting() throws IOException
    {
        int place = 0;
        fileScan = new Scanner(new File("integers.txt"));
        while(fileScan.hasNext())
        {    
            oneLine = fileScan.nextLine();
            dataScan = new Scanner(oneLine);
            v = dataScan.nextInt(); //it errors here
 
            a[place] = v;
            place++;
        }
    }
 
    public static void main(String args[]) throws IOException
    {
        Sorting s = new Sorting();
        BubbleSort bubble = new BubbleSort();
        InsertionSort insert = new InsertionSort();
        SelectionSort select = new SelectionSort();
 
        bubble.sort(a);
        insert.sort(a);
        select.sort(a);
 
        System.out.println("Bubble Sort had " + bubble.getCompare() 
            + " comparisons and " + bubble.getExchange() + " exchanges.");
 
        System.out.println("Insertion Sort had " + insert.getCompare() 
            +" comparisons and " + insert.getExchange() + " exchanges.");
 
        System.out.println("Selection Sort had " + select.getCompare() 
            +" comparisons and " + select.getExchange() + " exchanges.");
    }
}