Add Two Numbers LeetCode (Linked List Addition Reverse)

You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. Input: (2 -> 4 -> 3) + (5 -> 6 -> 4) Output: 7 -> 0 -> 8

The problem is quite popular in LeetCode and is well discussed in several forums.

Solution:

Source code: Java