Java ArrayList帮助(Java ArrayList Help)

import java.util.ArrayList;
public class WTFAMIDOINGWRONG 
{
    public static void main(String[] args)
    {
        ArrayList<Integer> intsAR = new ArrayList<Integer>(5);
        intsAR.add(3, 1);

    }
}
 
 所以，我一直在玩这个约一个小时，我没有丝毫想法我可能做错了什么。 无论我做什么，它都确信arraylist没有大小，因此一切都是出界的。 如果有人能告诉我我做错了什么，我真的很感激。 

import java.util.ArrayList;
public class WTFAMIDOINGWRONG 
{
    public static void main(String[] args)
    {
        ArrayList<Integer> intsAR = new ArrayList<Integer>(5);
        intsAR.add(3, 1);

    }
}
 
So, I've been fooling around with this for about an hour and I haven't the slightest Idea what I could be doing wrong. No matter what I do, it's convinced the arraylist has no size and everything is therefore out of bounds. If anyone could tell me what I'm doing wrong I'd really appreciate it.

原文：https://stackoverflow.com/questions/5138213