Here you can find the source of roundDown(long size, long roundBoundary)
public static long roundDown(long size, long roundBoundary)
//package com.java2s; /* /*ww w . j a va 2s.c om*/ Java MFS (jmfs) - Copyright (C) 2010 Artem Erchov Contact: comer0@gmail.com This file is part of jmfs. jmfs 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. jmfs 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 long roundDown(long size, long roundBoundary) { return (size - (size % roundBoundary)); } }