I have a arrayList done this way:
ArrayList<ArrayList<Double>> level = new ArrayList<ArrayList<Double>>(levels + 1);
So something like: enter image description here
What I would do is add a new element to the internal list saved in a certain index i of the external list.
How can I do this?
I can't use method arrayList.add(i, 0.0);.
Use index from the external ArrayList and use it to add the number. Like this
level.get(i).add(1.1);
i and what is the size of level?ArrayList<Double>, not only level. Good luck :)You need to get the list at a given position first and then insert into it the value desired.
final List<List<Double>> listOnList = new ArrayList<List<Double>>();
listOnList.add(new ArrayList<Double>());
listOnList.get(0).add(155.0);
