从方法读取文件时出现无限循环

Getting infinite loop when reading file from method

我正在尝试重构我的代码,并尽可能添加方法。当我从方法中读取文件并 return 计算结果时,代码进入极端内存消耗,无限循环。

我的修改是这样的:

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());


    }
}

如果不是编写方法,而是将代码放在 main 上,那么它就可以工作。为什么是这样?

编辑

numbers.txt的内容是:

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

所以我希望输出是:

总行数为:22

您陷入无限循环的原因是您正在读取文件但没有在 while 循环中递增扫描仪令牌。所以 while condition 总是 true.

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