Here you can find the source of convertToDouble(long fromTime, TimeUnit fromTimeUnit, TimeUnit toTimeUnit)
public static double convertToDouble(long fromTime, TimeUnit fromTimeUnit, TimeUnit toTimeUnit)
//package com.java2s; /*/*from w ww . j a va2 s . co m*/ * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 David Berkman * * This file is part of the SmallMind Code Project. * * The SmallMind Code Project is free software, you can redistribute * it and/or modify it under the terms of GNU Affero General Public * License as published by the Free Software Foundation, either version 3 * of the License, or (at your option) any later version. * * The SmallMind Code Project 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 the GNU Affero General Public * License, along with the SmallMind Code Project. If not, see * <http://www.gnu.org/licenses/>. * * Additional permission under the GNU Affero GPL version 3 section 7 * ------------------------------------------------------------------ * If you modify this Program, or any covered work, by linking or * combining it with other code, such other code is not for that reason * alone subject to any of the requirements of the GNU Affero GPL * version 3. */ import java.util.concurrent.TimeUnit; public class Main { public static double convertToDouble(long fromTime, TimeUnit fromTimeUnit, TimeUnit toTimeUnit) { return (fromTimeUnit.ordinal() >= toTimeUnit.ordinal()) ? (double) toTimeUnit.convert(fromTime, fromTimeUnit) : ((double) fromTime) / fromTimeUnit.convert(1, toTimeUnit); } }