Here you can find the source of longFromBytes(byte[] value)
public static long longFromBytes(byte[] value)
//package com.java2s; //License from project: Apache License import java.nio.ByteBuffer; public class Main { public static long longFromBytes(byte[] value) { return ByteBuffer.wrap(value).getLong(); }/*from w w w . j av a 2 s.co m*/ }