Add A 2D Array to Array List of Arrays

Question

Edit: Array List declaration:

List<String> shapeList = new ArrayList<String>();

I'm trying to create an array of 2D arrays using an array list.

shapeList.add(drawBoxClassObject.drawBox(l));

Where drawBoxClassObject.drawBox(l); returns a 2D string array, this line gives me this error:

no suitable method found for add(String[][])
method Collection.add(String) is not applicable
  (argument mismatch; String[][] cannot be converted to String)
method List.add(String) is not applicable
  (argument mismatch; String[][] cannot be converted to String)

How can I store the 2D string array itself inside a 1D string array (which I think would fix the cannot be converted to String)?

Answer 1

Change the declaration of shapeList from

List<String> shapeList = new ArrayList<>();

to

List<String[][]> shapeList = new ArrayList<>();

Answer 2

Your error shows that your shapeList is initialized somewhat like this:

List<String> shapeList = new ArrayList<>();

But if you want to store drawBoxClassObject , then you need to change declaration to accept 2D string array, like this:

List<String[][]> shapeList = new ArrayList<>();

Answer 3

This should work:

    List<String[][]> shapeList = new ArrayList<String[][]>();

You are putting a String[][] not a String.