How to initialize a multi-dimensional array of unknown array length

Question

I am getting problems when generating a multi-dimensional array with unknown size. How can I fix it?

Answer 1

To generate a multi-dimensional array with unknown size is called a jagged array.

For example:

String[][] array = new String[5][];

Java uses arrays of arrays for multi-dimensional arrays. I think you have to specify the first size. Otherwise, use list of lists.

ArrayList<ArrayList<String>> list = new ArrayList<ArrayList<String>>();