Java tutorial
//package com.java2s; /* * Copyright (C) 2014 Ingenic Semiconductor * * ZhangYanMing <yanming.zhang@ingenic.com, jamincheung@126.com> * * Elf/IDWS Project * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. * */ public class Main { private static int writeDouble(byte[] buffer, int offset, double value) { return writeLong(buffer, offset, Double.doubleToLongBits(value)); } private static int writeLong(byte[] buffer, int offset, long value) { buffer[offset++] = (byte) ((value & 0xff00000000000000L) >> 56); buffer[offset++] = (byte) ((value & 0x00ff000000000000L) >> 48); buffer[offset++] = (byte) ((value & 0x0000ff0000000000L) >> 40); buffer[offset++] = (byte) ((value & 0x000000ff00000000L) >> 32); buffer[offset++] = (byte) ((value & 0x00000000ff000000L) >> 24); buffer[offset++] = (byte) ((value & 0x0000000000ff0000L) >> 16); buffer[offset++] = (byte) ((value & 0x000000000000ff00L) >> 8); buffer[offset++] = (byte) ((value & 0x00000000000000ffL) >> 0); return offset; } }