Here you can find the source of longToByteArray(long value, byte[] buffer, int offset)
public static final long longToByteArray(long value, byte[] buffer, int offset)
//package com.java2s; /*/*from www. ja va 2s . co m*/ * Copyright 2010 The Portico Project * * This file is part of portico. * * portico is free software; you can redistribute it and/or modify * it under the terms of the Common Developer and Distribution License (CDDL) * as published by Sun Microsystems. For more information see the LICENSE file. * * Use of this software is strictly AT YOUR OWN RISK!!! * If something bad happens you do not have permission to come crying to me. * (that goes for your lawyer as well) * */ public class Main { /** * Take the given long value and convert it into a byte array suitable for sending over the * network. This data is written into the provided buffer. If there is not enough room in * the buffer, a RuntimeException will be thrown. * * @return The number of bytes written */ public static final long longToByteArray(long value, byte[] buffer, int offset) { if ((buffer.length - offset) < 8) { throw new RuntimeException("Not enough space in buffer to write long. Expected at " + "least 8-bytes, found " + (buffer.length - offset)); } buffer[offset] = (byte) ((value >> 56) & 0xff); buffer[offset + 1] = (byte) ((value >> 48) & 0xff); buffer[offset + 2] = (byte) ((value >> 40) & 0xff); buffer[offset + 3] = (byte) ((value >> 32) & 0xff); buffer[offset + 4] = (byte) ((value >> 24) & 0xff); buffer[offset + 5] = (byte) ((value >> 16) & 0xff); buffer[offset + 6] = (byte) ((value >> 8) & 0xff); buffer[offset + 7] = (byte) ((value >> 0) & 0xff); return 8; } }