Here you can find the source of bytesToLong(byte[] a, int ao)
public static final long bytesToLong(byte[] a, int ao)
//package com.java2s; /**// w w w. j a v a 2s. co m * Commmon Internet File System Java API (JCIFS) *---------------------------------------------------------------- * Copyright (C) 1999 Norbert Hranitzky * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. * * The full copyright text: http://www.gnu.org/copyleft/gpl.html * *---------------------------------------------------------------- * Author: Norbert Hranitzky * Email : norbert.hranitzky@mchp.siemens.de * Web : http://www.hranitzky.purespace.de */ public class Main { public static final long bytesToLong(byte[] a, int ao) { return ((a[ao] & 0xffL) << 56) | ((a[ao + 1] & 0xffL) << 48) | ((a[ao + 2] & 0xffL) << 40) | ((a[ao + 3] & 0xffL) << 32) | ((a[ao + 4] & 0xffL) << 24) | ((a[ao + 5] & 0xffL) << 16) | ((a[ao + 6] & 0xffL) << 8) | (a[ao + 7] & 0xffL); } }