How to find repeating sequence of Integers in an array of Integers?

Question

How to find repeating sequence of Integers in an array of Integers?

00 would be repeating, so would 123123, but 01234593623 would not be.

I have an idea to h

Answer 1

The answer posted by @AdrianLeonhard is perfectly working. But if I have a sequence of 0, 1, 2, 3, 4, 3, 5, 6, 4, 7, 8, 7, 8 many might be wondering on how to get all the repeated numbers from the array.

So, I wrote this simple logic which prints all the repeated numbers with their positions

    int[] arr = {0, 1, 2, 3, 4, 3, 5, 6, 4, 7, 8, 7, 8};

    for(int i=0; i