Here you can find the source of longToByteArray(long l)
public static byte[] longToByteArray(long l)
//package com.java2s; /**// w ww . j a v a2 s . co m * Copyright (C) 2014 Open Whisper Systems * * 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 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static byte[] longToByteArray(long l) { byte[] bytes = new byte[8]; longToByteArray(bytes, 0, l); return bytes; } public static int longToByteArray(byte[] bytes, int offset, long value) { bytes[offset + 7] = (byte) value; bytes[offset + 6] = (byte) (value >> 8); bytes[offset + 5] = (byte) (value >> 16); bytes[offset + 4] = (byte) (value >> 24); bytes[offset + 3] = (byte) (value >> 32); bytes[offset + 2] = (byte) (value >> 40); bytes[offset + 1] = (byte) (value >> 48); bytes[offset] = (byte) (value >> 56); return 8; } }