String's CharAt method using long

Question

I want to find the character at a particular position of a very large string. However i am unable to use charAt() method because the range exceeds that of int.

Answer 1

In Java, Strings are backed by a character array. The theoretical size of an array is limited by the maximum value of int, so it's impossible to have a String with over 2³¹-1 characters to begin with.

To overcome this issue you can create a string class of your own that uses multiple arrays or strings as storage.