java - 程序占用了我的所有资源并且未完成(可能是无限循环？)

Question

我编写这个程序是为了从文件中获取学生记录并将它们放入数组中。然后我对它们进行冒泡排序并尝试打印它们。

import java.io.*;
import java.util.Scanner;

public class StudentTest 
{

public static void main(String[] args) 
{
    String name;
    String address;
    String major;
    double gpa;
    int classLevel;
    int college;
    String idNumber;

    Scanner fileIn = null;
    try
    {
        fileIn = new Scanner (new FileInputStream("student.dat"));
    }
    catch (FileNotFoundException e)
    {
        System.out.println("File not found");
        System.exit(0);
    }

    Student[] aStudent = new Student[15];
    int index = 0;

    for (index=0; index < 15;)
    {
        while (fileIn.hasNext())
        {
        name = fileIn.nextLine();
        address = fileIn.nextLine();
        major = fileIn.nextLine();
        gpa = fileIn.nextDouble();
        classLevel = fileIn.nextInt();
        college = fileIn.nextInt();
        fileIn.nextLine();
        idNumber = fileIn.nextLine();
        aStudent[index] = new Student(name, address, major, gpa, classLevel, college, idNumber);
        aStudent[index].Display();
        System.out.println(index);
        index++;
        }
    }


    Student temp= null;
    for (int pass = 0; pass < (index-1); pass++)
    {
        for (int c = 0; c < (index - 1); c++)
        {
            if  (aStudent[c].getName().compareTo(aStudent[c+1].getName()) > 0)
            {
                temp = aStudent[c];
                aStudent[c]=aStudent[+1];
                aStudent[+1]=temp;
            }
        }
    }
    for (int d = 0; d < aStudent.length; d++)
    {
        aStudent[d].Display();
        System.out.println();
    //aStudent[d].Display();
    }
    //System.out.println(aStudent);
}
}

控制台将在加载数组时显示未排序列表的第一个打印，然后就坐在那里。我让它走了十分钟，它仍然在 Eclipse 中显示红色的“终止”图标(表明它仍在运行)。它也一直在消耗我一半的资源。我该如何解决这个问题？

谢谢

Answer 1

将循环更改为

while (fileIn.hasNext() && index < 15)

不需要for循环

思考 - 如果索引小于 15 并且没有下一条记录会发生什么