/***************************************************************************
* Copyright 2006-2016 by Christian Ihle *
* contact@kouchat.net *
* *
* This file is part of KouChat. *
* *
* KouChat is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 3 of *
* the License, or (at your option) any later version. *
* *
* KouChat 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with KouChat. *
* If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
package net.usikkert.kouchat.util;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* Utility methods for working with date and time.
*
* @author Christian Ihle
*/
public class DateTools {
/**
* Converts the current date to a string, in the format specified.
*
* @param format The format to get the current date in.
* @return A converted date.
* @see SimpleDateFormat
*/
public String currentDateToString(final String format) {
return dateToString(null, format);
}
/**
* Converts the specified date to a string, in the format specified.
*
* @param date The date to convert to a string.
* @param format The format to get the date in.
* @return A converted date.
* @see SimpleDateFormat
*/
public String dateToString(final Date date, final String format) {
return Tools.dateToString(date, format);
}
/**
* Returns a string showing how long has passed from 'then' to now.
*
* @param then An earlier time.
* @return How long it's been since 'then'.
*/
public String howLongFromNow(final long then) {
if (then != 0) {
final long diff = System.currentTimeMillis() - then;
final long totSec = diff / 1000;
final int oneday = 86400;
final int onehour = 3600;
final int onemin = 60;
final int days = Math.round(totSec / oneday);
final int hours = Math.round(totSec - days * oneday) / onehour;
final int minutes = Math.round(totSec - days * oneday - hours * onehour) / onemin;
final int seconds = Math.round(totSec - days * oneday - hours * onehour - minutes * onemin);
return days + " days, " + Tools.getDoubleDigit(hours) + ":" + Tools.getDoubleDigit(minutes) +
":" + Tools.getDoubleDigit(seconds);
}
else {
return "0 days, 00:00:00";
}
}
}