In Java, how do I convert a byte array to a string of hex digits while keeping leading zeros? [duplicate]

Answer 1

Or you can do this:

byte[] digest = algorithm.digest();
StringBuilder byteContet = new StringBuilder();
for(byte b: digest){
 byteContent = String.format("%02x",b);
 byteContent.append(byteContent);
}

Its Short, simple and basically just a format change.