Added Automorphic Number

An automorphic number is a number whose square "ends" in the same digits as the number itself. For example, 5^2 = 25, 6^2 = 36, 76^2 = 5776, and 890625^2 = 793212890625, so 5, 6, 76 and 890625 are all automorphic numbers.

Test Data
Input a number : 76

Output:
Input a number : 76
Automorphic Number.

Please assign it to me. I want to do this in java.

I submitted my PR for automorphic number. Please review it and please add the label "hacktober-accepted" to it. Please.