How can I represent a 128bit integer in Java or C++? [closed]

Question

Is it possible to have a 128bit integer in Java or C++?

Answer 1

Of course you can represent them.

At least you can use a byte-array with 16 elements.

However, the question is if you just want to represent the value or actually do some calculations with it.

In Java you can use BigInteger to represent (effectively) arbitrary sized integer values and do calculations as well.