Here you can find the source of toBytes(String hex)
| Parameter | Description |
|---|---|
| hex | a parameter |
public static byte[] toBytes(String hex)
//package com.java2s; /*// w ww . ja v a 2s . c o m ************************************************************************ ******************* CANADIAN ASTRONOMY DATA CENTRE ******************* ************** CENTRE CANADIEN DE DONN?ES ASTRONOMIQUES ************** * * (c) 2009. (c) 2009. * Government of Canada Gouvernement du Canada * National Research Council Conseil national de recherches * Ottawa, Canada, K1A 0R6 Ottawa, Canada, K1A 0R6 * All rights reserved Tous droits r?serv?s * * NRC disclaims any warranties, Le CNRC d?nie toute garantie * expressed, implied, or ?nonc?e, implicite ou l?gale, * statutory, of any kind with de quelque nature que ce * respect to the software, soit, concernant le logiciel, * including without limitation y compris sans restriction * any warranty of merchantability toute garantie de valeur * or fitness for a particular marchande ou de pertinence * purpose. NRC shall not be pour un usage particulier. * liable in any event for any Le CNRC ne pourra en aucun cas * damages, whether direct or ?tre tenu responsable de tout * indirect, special or general, dommage, direct ou indirect, * consequential or incidental, particulier ou g?n?ral, * arising from the use of the accessoire ou fortuit, r?sultant * software. Neither the name de l'utilisation du logiciel. Ni * of the National Research le nom du Conseil National de * Council of Canada nor the Recherches du Canada ni les noms * names of its contributors may de ses participants ne peuvent * be used to endorse or promote ?tre utilis?s pour approuver ou * products derived from this promouvoir les produits d?riv?s * software without specific prior de ce logiciel sans autorisation * written permission. pr?alable et particuli?re * par ?crit. * * This file is part of the Ce fichier fait partie du projet * OpenCADC project. OpenCADC. * * OpenCADC is free software: OpenCADC est un logiciel libre ; * you can redistribute it and/or vous pouvez le redistribuer ou le * modify it under the terms of modifier suivant les termes de * the GNU Affero General Public la ?GNU Affero General Public * License as published by the License?? telle que publi?e * Free Software Foundation, par la Free Software Foundation * either version 3 of the : soit la version 3 de cette * License, or (at your option) licence, soit (? votre gr?) * any later version. toute version ult?rieure. * * OpenCADC is distributed in the OpenCADC est distribu? * hope that it will be useful, dans l?espoir qu?il vous * but WITHOUT ANY WARRANTY; sera utile, mais SANS AUCUNE * without even the implied GARANTIE : sans m?me la garantie * warranty of MERCHANTABILITY implicite de COMMERCIALISABILIT? * or FITNESS FOR A PARTICULAR ni d?AD?QUATION ? UN OBJECTIF * PURPOSE. See the GNU Affero PARTICULIER. Consultez la Licence * General Public License for G?n?rale Publique GNU Affero * more details. pour plus de d?tails. * * You should have received Vous devriez avoir re?u une * a copy of the GNU Affero copie de la Licence G?n?rale * General Public License along Publique GNU Affero avec * with OpenCADC. If not, see OpenCADC ; si ce n?est * <http://www.gnu.org/licenses/>. pas le cas, consultez : * <http://www.gnu.org/licenses/>. * * $Revision: 4 $ * ************************************************************************ */ public class Main { private static byte[] correspondingNibble = new byte['f' + 1]; /** * Put byte into an array of length == 1. * * @param n * @return a minimum-sized byte[] containing n */ public static byte[] toBytes(byte n) { return new byte[] { n }; } /** * Encode a short as bytes and put into array of length == 2. * * @param n * @return a minimum-sized byte[] containing n */ public static byte[] toBytes(short n) { byte[] ret = new byte[2]; ret[0] = (byte) (n >> 8); ret[1] = (byte) ((n << 8) >> 8); //ret[1] = (byte) (n & 0x00ff ); return ret; } /** * Encode a int as bytes and put into array of length == 4. * * @param n * @return a minimum-sized byte[] containing n */ public static byte[] toBytes(int n) { byte[] ret = new byte[4]; ret[0] = (byte) (n >> 24); ret[1] = (byte) ((n << 8) >> 24); ret[2] = (byte) ((n << 16) >> 24); ret[3] = (byte) ((n << 24) >> 24); return ret; } /** * Encode a long as bytes and put into array of length == 8. * * @param n * @return a minimum-sized byte[] containing n */ public static byte[] toBytes(long n) { byte[] ret = new byte[8]; ret[0] = (byte) (n >> 56); ret[1] = (byte) ((n << 8) >> 56); ret[2] = (byte) ((n << 16) >> 56); ret[3] = (byte) ((n << 24) >> 56); ret[4] = (byte) ((n << 32) >> 56); ret[5] = (byte) ((n << 40) >> 56); ret[6] = (byte) ((n << 48) >> 56); ret[7] = (byte) ((n << 56) >> 56); return ret; } /** * Convert a hex string to a byte[]. * * @param hex * @return byte array */ public static byte[] toBytes(String hex) { if (hex == null || hex.length() % 2 != 0) throw new IllegalArgumentException(); byte[] ret = new byte[hex.length() / 2]; //for (int i=0; i<ret.length; i++) // ret[i] = HexUtil.toByte(hex.substring(i*2, 2)); for (int i = 0, j = 0; i < hex.length(); i += 2, j++) { int high = charToNibble(hex.charAt(i)); int low = charToNibble(hex.charAt(i + 1)); // You can store either unsigned 0..255 or signed -128..127 bytes in a byte type. ret[j] = (byte) ((high << 4) | low); } return ret; } private static int charToNibble(char c) { if (c > 'f') { throw new IllegalArgumentException("Invalid hex character: " + c); } int nibble = correspondingNibble[c]; if (nibble < 0) { throw new IllegalArgumentException("Invalid hex character: " + c); } return nibble; } }