Getting infinite loop when reading file from method

Question

I am trying to refactor my code, and adding methods where possible. When I read a file from a method and return the result of the computation, the code goes into extreme memory consumption, infinite loop.

My modification looks like this:

import java.util.Scanner;

public class NumberOfLines {
    public static int compute () {
        // read this file
        String theFile = "numbers.txt";

        Scanner fileRead = null;

        if (NumberOfLines.class.getResourceAsStream(theFile) != null) {
            fileRead = new Scanner(NumberOfLines.class.getResourceAsStream(theFile));
        }           
        else {
            System.out.print("The file " + theFile + " was not found");
            System.exit(0);
        }

        System.out.println("Checkpoint: I am stuck here");

        // count number of lines
        int totalLines = 0;
        while(fileRead.hasNextInt()) {
            totalLines++;

        }
        fileRead.close();
        return totalLines;

    }

    public static void main (String[] args) {

        System.out.println("The total number of lines is: " + compute());


    }
}

If instead of writing the method, and placing the code on main, then it works. Why is this?

EDIT

Contents of numbers.txt is:

5 
2
7
4
9
1
5
9
69
5
2
5
6
10
23
5
36
5
2
8
9
6

So I expect out put to be:

总行数为：22

Answer 1

陷入无限循环的原因是，您正在读取文件，但没有在while循环中增加扫描程序令牌。因此，while 条件始终为真。

while (fileRead.hasNextInt()) {
    totalLines++;
    fileRead.nextInt();  // change made here only
}