Here you can find the source of longToBytes(long v, byte[] b)
public final static void longToBytes(long v, byte[] b)
//package com.java2s; /******************************************************************************* * Copyright (c) 2004,2009 Actuate Corporation. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors:/*w w w.j a v a 2s.c o m*/ * Actuate Corporation - initial API and implementation *******************************************************************************/ public class Main { public final static void longToBytes(long v, byte[] b) { assert b.length >= 8; b[0] = (byte) ((v >>> 56) & 0xFF); b[1] = (byte) ((v >>> 48) & 0xFF); b[2] = (byte) ((v >>> 40) & 0xFF); b[3] = (byte) ((v >>> 32) & 0xFF); b[4] = (byte) ((v >>> 24) & 0xFF); b[5] = (byte) ((v >>> 16) & 0xFF); b[6] = (byte) ((v >>> 8) & 0xFF); b[7] = (byte) ((v >>> 0) & 0xFF); } public final static void longToBytes(long v, byte[] b, int off) { assert b.length - off >= 8; b[off++] = (byte) ((v >>> 56) & 0xFF); b[off++] = (byte) ((v >>> 48) & 0xFF); b[off++] = (byte) ((v >>> 40) & 0xFF); b[off++] = (byte) ((v >>> 32) & 0xFF); b[off++] = (byte) ((v >>> 24) & 0xFF); b[off++] = (byte) ((v >>> 16) & 0xFF); b[off++] = (byte) ((v >>> 8) & 0xFF); b[off] = (byte) ((v >>> 0) & 0xFF); } }