异常螺纹＆QUOT;主＆QUOT; java.lang.ArrayIndexOutOfBoundsException [英] Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException

问题描述

我是新来编程和运行在Eclipse中一些新的code，同时，我碰到这个错误来了，我完全失去了。

I am new to programming and while running some new code in eclipse, I came across this error and am completely lost.

import java.util.Scanner;

public class Lab6
{
    public static void main(String[] args)
    {
        // Fill in the body according to the following comments
    Scanner in= new Scanner(System.in); 
        // Input file name
        String FileName=getFileName(in);
        // Input number of students
        int numOfStudents = FileIOHelper.getNumberOfStudents(FileName);
        Student students[] = getStudents(numOfStudents); 
        // Input all student records and create Student array and
        // integer array for total scores
        int[]totalScores = new int[students.length];
        for(int i=0; i< students.length; i++)
        {
            for(int j=1; j<4; j++)
            {
                totalScores[i]= totalScores[i]+students[i].getScore(j);
            }
        }
        // Compute total scores and find students with lowest and
        // highest total score
        int i;
        int maxIndex =0;
        int minIndex =0;
        for(i=0; i<students.length; i++);
        {
            if(totalScores[i]>=totalScores[maxIndex])
            {
                maxIndex=i;
            }
            else if(totalScores[i]<=totalScores[minIndex])
            {
                minIndex=i;
            }
        }

问题似乎是在该行如果（totalScores [I]> = totalScores [maxIndex]）

推荐答案

您有一个; 后您的最后一个为，所以 在每一步没有额外的命令执行后，变量 I 将具有值 students.length 这是数组的边界之外。然后按照对与那终值我执行一次 {...} 块，导致异常

You have a ; after your last for, so after the for executes with no additional commands in each step, the variable i will have the value students.length which is outside the bounds of the array. Then the { ... } block following the for is executed once with that final value of i, causing the exception.

删除; ，它应该工作

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