How to calculate the hash value of a specific byte array

Question

How I calculate the hash value of a specific byte array?

I’m using MD5 encryption and the code to calculate what I’m using is this:

        byte[] dataRegCodeToCompare = md5.digest(toHash);

The variable toHash is the byte array. I already have a table of values of toHash and dataRegCodeToCompare that has to come out but, calculated and inserted in dataRegCodeToCompare are not knocking.

Follows the values of toHash: [52, 80, 69, 82, 68, 73, 57, 78, 69, 67, 56, 56, 73, 80, 49, 73, 53, 79, 48, 68, 65, 65, 51, 67, 52, 79, 50, 82, 53, 82, 65, 69]

Follows the values of dataRegCodeToCompare: [43, 252, 237, 75, 30, 238, 188, 243, 213, 203, 78, 212, 226, 27, 49, 241]

And these are the values of dataRegCodeToCompare who are leaving with the code indicated at the beginning of the question: [43, -4, -19, 75, 30, -18, -68, -13, -43, -53, 78, -44, -30, 27, 49, -15] some values are even negative.