Here you can find the source of toBytes(char[] cbuf, byte[] bs)
public static void toBytes(char[] cbuf, byte[] bs)
//package com.java2s; /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1//from w w w .ja v a 2 s . c o m * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is part of dcm4che, an implementation of DICOM(TM) in * Java(TM), hosted at http://sourceforge.net/projects/dcm4che. * * The Initial Developer of the Original Code is * TIANI Medgraph AG. * Portions created by the Initial Developer are Copyright (C) 2002-2005 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Gunter Zeilinger <gunter.zeilinger@tiani.com> * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ public class Main { public static void toBytes(char[] cbuf, byte[] bs) { for (int i = 0, j = 0; i < bs.length; i++, j++, j++) { bs[i] = (byte) ((hex2digit(cbuf[j]) << 4) | hex2digit(cbuf[j + 1])); } } public static byte[] toBytes(char[] cbuf) { byte[] bs = new byte[cbuf.length / 2]; toBytes(cbuf, bs); return bs; } public static byte[] toBytes(String s) { return toBytes(s.toCharArray()); } private static int hex2digit(char ch) { return ch < '0' ? 0 : ch <= '9' ? (ch - '0') : ch < 'A' ? 0 : ch <= 'F' ? (ch - ('A' - 10)) : ch < 'a' ? 0 : ch <= 'f' ? (ch - ('a' - 10)) : 0; } }