Java tutorial
//package com.java2s; /** * Copyright (C) 2014-2016 Regents of the University of California. * @author: Jeff Thompson <jefft0@remap.ucla.edu> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * A copy of the GNU Lesser General Public License is in the file COPYING. */ public class Main { /** * Return a hex string of the contents of buffer. * @param buffer The buffer. * @return A string of hex bytes. */ public static String toHex(byte[] buffer) { StringBuffer output = new StringBuffer(buffer.length * 2); for (int i = 0; i < buffer.length; ++i) { String hex = Integer.toHexString((int) buffer[i] & 0xff); if (hex.length() <= 1) // Append the leading zero. output.append("0"); output.append(hex); } return output.toString(); } }