/* * Copyright 2010-2013 Institut Pasteur. * * This file is part of Icy. * * Icy 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. * * Icy 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 Icy. If not, see <http://www.gnu.org/licenses/>. */ package icy.util; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; /** * Date utilities class. * * @author Stephane */ public class DateUtil { public static final long DAY_IN_MS = 1000 * 60 * 60 * 24; /** * Returns elapsed milli second from 01/01/1970 (same as {@link System#currentTimeMillis()}) */ public static long getTime() { return System.currentTimeMillis(); } /** * Keep only the day part information from the given time (elapsed milli second from * 01/01/1970). * * @see System#currentTimeMillis */ public static long keepDay(long time) { return (time / DAY_IN_MS) * DAY_IN_MS; } /** * Keep only the time information (hour, minute, second and milli second) from the given time * (elapsed milli second from 01/01/1970). * * @see System#currentTimeMillis */ public static long keepTime(long time) { return time % DAY_IN_MS; } /** * Return elapsed day from 01/01/1970 * * @see System#currentTimeMillis */ public static long getDay() { return getTime() / DAY_IN_MS; } /** * Return current date. */ public static Date now() { return Calendar.getInstance().getTime(); } /** * Return current date (String format).<br> * * @param format * define the wanted format.<br> * Ex :<br> * DateUtil.now("dd MMMMM yyyy");<br> * DateUtil.now("yyyyMMdd");<br> * DateUtil.now("MM/dd/yy");<br> * DateUtil.now("yyyy.MM.dd G 'at' hh:mm:ss z");<br> * DateUtil.now("H:mm:ss:SSS");<br> * DateUtil.now("yyyy.MMMMM.dd GGG hh:mm aaa");<br> */ public static String now(String format) { return new SimpleDateFormat(format).format(now()); } /** * Return the specified date in String format.<br> * * @param format * define the wanted format.<br> * Ex :<br> * DateUtil.now("dd MMMMM yyyy");<br> * DateUtil.now("yyyyMMdd");<br> * DateUtil.now("MM/dd/yy");<br> * DateUtil.now("yyyy.MM.dd G 'at' hh:mm:ss z");<br> * DateUtil.now("H:mm:ss:SSS");<br> * DateUtil.now("yyyy.MMMMM.dd GGG hh:mm aaa");<br> */ public static String format(String format, Date date) { return new SimpleDateFormat(format).format(date); } }