如何在特定索引中插入for循环的数据？

I have a "for" loop that is creating a variable each time through the loop. I am attempting to insert the results into an empty array at the index of the "i" in the loop. From the best I can tell it seems I need to create a ArrayList vs. an Array to make this happen.

我有一个“for”循环,每次循环都会创建一个变量。我试图将结果插入到循环中“i”的索引处的空数组中。从最好的我可以告诉它似乎我需要创建一个ArrayList与一个数组来实现这一点。

int varNum = 10;  
Array someArr = new Array ();

for (int i = 0; i < 10; i++){
varNum = varNum +i;
someArr[i] = varNum;
}

On the first loop I want the 10 to be inserted in my array at the "0 index", 11 inserted at "1 index", 12 at the "2 Index".

在第一个循环中,我希望将10插入到我的数组中的“0索引”,11插入“1索引”,12插入“2索引”。

**The important part is that the Array is not a set size, because I do not know how many indexes I will need in the array, so I want to add them as I needed.

**重要的是,Array不是一个设置大小,因为我不知道我需要在数组中有多少索引,所以我想根据需要添加它们。

2 个解决方案

#1

If you use an ArrayList you can call add like this:

如果您使用ArrayList,可以像这样调用add:

int varNum = 10;
ArrayList<Integer> someArr = new ArrayList<Integer>();

for (int i = 0; i < 10; i++)
{
    varNum = varNum + i;
    someArr.add(varNum);
}

This will allow you to dynamically fill the ArrayList dependent upon how many values it needs to hold.

这将允许您根据需要保存的值来动态填充ArrayList。

#2

Better use an ArrayList then, and use their .add() method

那么最好使用ArrayList,并使用他们的.add()方法

someArr.add(varNum)

#1