Here you can find the source of calculateDuration(Duration minimum, Duration maximum, Long iteration)
private static Duration calculateDuration(Duration minimum, Duration maximum, Long iteration)
//package com.java2s; /*//w ww.j a va 2 s . c om * Copyright 2013-2016 the original author or authors. * * 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. */ import java.time.Duration; public class Main { private static Duration calculateDuration(Duration minimum, Duration maximum, Long iteration) { Duration candidate = minimum.multipliedBy((long) Math.pow(2, iteration)); return min(candidate, maximum); } private static Duration min(Duration a, Duration b) { return (a.compareTo(b) <= 0) ? a : b; } }