我的数组中发生了奇怪的事情

Question

好吧，我将显示我的代码以及我的输入和输出，这非常奇怪我的数组的值似乎从一行变为下一行。

import java.io.*;
class chefAndNewRecipe 
{
public static void main(String[] args) throws IOException
{
    // TODO Auto-generated method stub
    BufferedReader r = new BufferedReader(new FileReader("/home/jer/Documents/chef.txt"));
    int testCases = Integer.parseInt(r.readLine());
    int numGuesses =0 ;
    for (int i=0; i<testCases; i++)
    {
        int ingredients = Integer.parseInt(r.readLine());
        String quantity = r.readLine();
        String arr[] = quantity.split(" ");
        int[] numIngredients = new int[arr.length];
        for (int j =0; j< ingredients; j++)
        {
            String temp = arr[i];
            numIngredients[i] = Integer.parseInt(temp);
            System.out.println("This is numIngredients index: " + j + " and value " +numIngredients[i]);//print array location and value
        }
        System.out.println("numIngredients[0]:" + numIngredients[0]); // should be 2 and is
        System.out.println("numIngredients[1]:" + numIngredients[1]); // should be 2 and is 0??
        for (int k = 0; k< numIngredients.length; k++)
        {   
            if (numIngredients[k] <2)
            {   
                System.out.println("Value of numIngredients[k]: " + numIngredients[k]);// print value of numIngredients
                System.out.println("-1");
            }
            else
            {   
                numGuesses += numIngredients[k];
            }
        }   
            System.out.println(numGuesses);
    }
}
}

我的输入是：
2
2
2 2
1
6

我的输出是：
这是数字索引：0和值2
这是数字索引：1和值2
数字[0]：2
数字[1]：0
数字的值[k]：0
-1
2
成分：1

数字的值[1]从2从一行变为另一行，我不了解发生了什么。

Answer 1

使用长变量名称即使对于循环变量也很有用 - 您似乎正在使用i而不是j：

for (int j = 0; j < arr.length; j++) // <== possibly arr.length is what you need.
{
    String temp = arr[j]; // <=== was i, same next line
    numIngredients[j] = Integer.parseInt(temp);
    System.out.println(
         "This is numIngredients index: " + j + //<== j this line
         " and value " + numIngredients[j]); // <== again, was using [i] 
}

使用currentIngredient代替j可能有助于找到错误。