Question

Can someone please point me out a hash function(preferably an implementation) which would let me have 256 bits string outputs for the given string?

Thank you very much in advance

Answer 1

MessageDigest md   = MessageDigest.getInstance("SHA-256"); //make sure it exists, there are other algorithms, but I prefer SHA for simple and relatively quick hashing
String strToEncode = "Hello world";
md.update(strToEncode.getBytes("UTF-8")); //I'd rather specify the encoding. It's platform dependent otherwise. 
byte[] digestBuff = md.digest();

digestBuff will contain the digested bytes.