Java: If an ArrayList has to be iterate to read data only, what is the fastest way?

Question

What is the simples way to check if the sum of two unsigned integers has resulted in an overflow.

Answer 1

This can be done in two ways, using for loop or using iterator of ArrayList,use of for loop is faster than using iterator bcoz value stored in arraylist is indexed access. So while accessing the value is accessed directly as per the index.