Here you can find the source of toLong(byte[] memory, int index)
public static long toLong(byte[] memory, int index)
//package com.java2s; /*/*from w ww.j ava2s . co m*/ * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ public class Main { public static long toLong(byte[] memory, int index) { return ((long) memory[index] & 0xff) << 56 | ((long) memory[index + 1] & 0xff) << 48 | ((long) memory[index + 2] & 0xff) << 40 | ((long) memory[index + 3] & 0xff) << 32 | ((long) memory[index + 4] & 0xff) << 24 | ((long) memory[index + 5] & 0xff) << 16 | ((long) memory[index + 6] & 0xff) << 8 | (long) memory[index + 7] & 0xff; } }