Here you can find the source of toLong(byte[] array, int offset)
public static long toLong(byte[] array, int offset)
//package com.java2s; /**//w w w.j a v a2 s. c o m * Copyright (c) 2002-2013 "Neo Technology," * Network Engine for Objects in Lund AB [http://neotechnology.com] * * This file is part of Neo4j. * * Neo4j 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 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static long toLong(byte[] array, int offset) { long value = 0; for (int i = offset; i < offset + 8; i++) { value <<= 8; value ^= (long) array[i] & 0xFF; } return value; } }