Here you can find the source of roundDown(long val, long delta)
public static long roundDown(long val, long delta)
//package com.java2s; /*//w ww . j av a 2 s . co m * Copyright 2015 Evgeny Dolganov (evgenij.dolganov@gmail.com). * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { public static long roundDown(long val, long delta) { boolean isNegative = val < 0; val = Math.abs(val); val = val / delta * delta; return !isNegative ? val : -val; } }