How to make ArrayList that work as two dimentional array in java?

Question

I want to make arrayList object in java that work as two dimentional array. My question is how can we access value from specific dimention from arrayList.

in two diment

Answer 1

You mean something like a List in a List??

May be something like...

List> twoDList = new ArrayList<>();

i want to make a List, in which each List key contains another List inside it

It should more like you want some kind of Map, which is basically a key/value pair.

Map> mapValues = new HashMap<>(25);
List listOfValues = ...;
//...
mapValues.put("A unique key for this list", listOfValues);

//...

List thatListOfValues = mapValues.get("A unique key for this list");