Java Calendar Adjust getMidnightCalendarByUnadjustedDate(Date date, TimeZone timezone)

Description

get Midnight Calendar By Unadjusted Date

License

Open Source License

Declaration

public static Calendar getMidnightCalendarByUnadjustedDate(Date date, TimeZone timezone) 

Method Source Code

//package com.java2s;
/**/*from   w w w  .  ja  va  2 s. c om*/
 * Tysan Clan Website
 * Copyright (C) 2008-2013 Jeroen Steenbeeke and Ties van de Ven
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.Calendar;
import java.util.Date;

import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static final TimeZone NEW_YORK = TimeZone.getTimeZone("America/New_York");

    public static Calendar getMidnightCalendarByUnadjustedDate(Date date, TimeZone timezone) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);

        Calendar mcal = getMidnightCalendarInstance(timezone);
        mcal.set(Calendar.DAY_OF_MONTH, cal.get(Calendar.DAY_OF_MONTH));
        mcal.set(Calendar.MONTH, cal.get(Calendar.MONTH));
        mcal.set(Calendar.YEAR, cal.get(Calendar.YEAR));

        return mcal;
    }

    public static Calendar getMidnightCalendarInstance() {
        Calendar cal = Calendar.getInstance(NEW_YORK, Locale.US);
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);

        return cal;
    }

    public static Calendar getMidnightCalendarInstance(TimeZone timezone) {
        Calendar cal = Calendar.getInstance(timezone, Locale.US);
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);

        return cal;
    }
}

Related

1. adjustDate(Calendar calendar, int differenceInDay)
2. adjustedMillis(Calendar cal)
3. adjustToDayEnd(Calendar cal)
4. adjustToFieldStart(Calendar cal, int[] fields)
5. adjustToMonthStart(Calendar cal)
6. truncCalendarToWeek(Calendar c, int adjustIncrement)
7. truncCalendarToWeek(Calendar c, int adjustIncrement)