Here you can find the source of byteArrayToLong(byte[] arr)
public static long byteArrayToLong(byte[] arr)
//package com.java2s; /*//from w w w .jav a 2 s . c om * Created by Angel Leon (@gubatron), Alden Torres (aldenml) * Copyright (c) 2011-2014, FrostWire(R). All rights reserved. * * 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 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/>. */ import java.nio.ByteBuffer; public class Main { public static long byteArrayToLong(byte[] arr) { return ByteBuffer.wrap(arr).getLong(); } }