Here you can find the source of double2bytes(double value)
public static byte[] double2bytes(double value)
//package com.java2s; /* ============================================================= * SmallSQL : a free Java DBMS library for the Java(tm) platform * ============================================================= * * (C) Copyright 2004-2011, by Volker Berlin. * * Project Info: http://www.smallsql.de/ * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version.//from w ww. ja v a 2s . co m * * This library 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 Lesser General Public * License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * [Java is a trademark or registered trademark of Sun Microsystems, Inc. * in the United States and other countries.] * * --------------- * Utils.java * --------------- * Author: Volker Berlin * */ public class Main { public static byte[] double2bytes(double value) { return long2bytes(Double.doubleToLongBits(value)); } public static byte[] long2bytes(long value) { byte[] result = new byte[8]; result[0] = (byte) (value >> 56); result[1] = (byte) (value >> 48); result[2] = (byte) (value >> 40); result[3] = (byte) (value >> 32); result[4] = (byte) (value >> 24); result[5] = (byte) (value >> 16); result[6] = (byte) (value >> 8); result[7] = (byte) (value); return result; } }