Adding String obj into a list within a list

Question

I keep getting an "identifier expected" when trying to use this statement. Does anyone have an idea why? .get is a method call of arrayList and im just getting an int index and I'm adding a string to that a list inside my arrayList

 ArrayList Obj.get.(index).add(Str);

I'm trying to get the index of my inner list inside my array list and add my string to the correct inner list because I have multiple of them — helper hex
– helper hex, Commented Apr 7, 2015 at 16:24

Frithjof · Accepted Answer · 2015-04-08 14:10:39Z

1

Your code has multiple errors.

First of all, that line is not declaring a variable, and therefore you don't specify the type (ArrayList).
Assuming your variable is called Obj, I would recommend you to call it something meaningful and name variables starting with lower-case letters (same deal with Str).
Do not add a dot (.) after the method name (get(index)).

After that, your line should look like this:

list.get(index).add(str);

To give you a better understanding, you can split that line of code in multiple lines:

List<String> subList = mainList.get(index);
subList.add(str);

edited Apr 8, 2015 at 14:10

answered Apr 7, 2015 at 16:24

Frithjof

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3 Comments

helper hex Over a year ago

It tells me I can not add string to my list(array list) of lists(linkedlists)

IdusOrtus Over a year ago

Declare em as List and assign em ArrayList and LinkedList, etc

helper hex Over a year ago

Could clarify what you mean? I don't quite understand.

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