Here you can find the source of convertHexStringToByteNoSpace(String s)
public static byte[] convertHexStringToByteNoSpace(String s)
//package com.java2s; /*//from w ww. j a v a2 s .c o m * LumaQQ - Java QQ Client * * Copyright (C) 2004 luma <stubma@163.com> * notXX * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ public class Main { public static byte[] convertHexStringToByteNoSpace(String s) { int len = s.length(); byte[] ret = new byte[len >>> 1]; for (int i = 0; i <= len - 2; i += 2) { ret[i >>> 1] = (byte) (Integer.parseInt(s.substring(i, i + 2).trim(), 16) & 0xFF); } return ret; } public static final int parseInt(byte[] content, int offset) { return ((content[offset++] & 0xff) << 24) | ((content[offset++] & 0xff) << 16) | ((content[offset++] & 0xff) << 8) | (content[offset++] & 0xff); } }