Here you can find the source of getHash(byte[]... bytesToHash)
public static String getHash(byte[]... bytesToHash) throws NoSuchAlgorithmException
//package com.java2s; /* Copyright (C) 2013-2015 Computer Sciences Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.math.BigInteger; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class Main { public static String getHash(byte[]... bytesToHash) throws NoSuchAlgorithmException { MessageDigest digest = MessageDigest.getInstance("SHA-256"); digest.reset();/*www . j a va 2s . com*/ for (byte[] bytes : bytesToHash) { digest.update(bytes); } BigInteger bigInt = new BigInteger(1, digest.digest()); return bigInt.toString(16); } }