Java Calendar Truncate truncCalendarToQuarter(Calendar c)

Description

truncate the calendar to half year (i.e.

License

Open Source License

Declaration

public static void truncCalendarToQuarter(Calendar c) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2010-2015 BSI Business Systems Integration AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors://w  w  w  .j  ava 2 s  .  c o m
 *     BSI Business Systems Integration AG - initial API and implementation
 ******************************************************************************/

import java.util.Calendar;

public class Main {
    /**
     * truncate the calendar to half year (i.e. jan 1, apr 1, jul 1 or oct 1 of the given year)
     *
     * @since 4.2
     */
    public static void truncCalendarToQuarter(Calendar c) {
        if (c == null) {
            return;
        }
        final int month = c.get(Calendar.MONTH);
        truncCalendarToYear(c);
        int quarterMonth = Calendar.JANUARY;
        switch (month) {
        case Calendar.APRIL:
        case Calendar.MAY:
        case Calendar.JUNE:
            quarterMonth = Calendar.APRIL;
            break;
        case Calendar.JULY:
        case Calendar.AUGUST:
        case Calendar.SEPTEMBER:
            quarterMonth = Calendar.JULY;
            break;
        case Calendar.OCTOBER:
        case Calendar.NOVEMBER:
        case Calendar.DECEMBER:
            quarterMonth = Calendar.OCTOBER;
            break;
        }
        if (quarterMonth != Calendar.JANUARY) {
            c.set(Calendar.MONTH, quarterMonth);
        }
    }

    /**
     * truncate the calendar to year
     */
    public static void truncCalendarToYear(Calendar c) {
        if (c == null) {
            return;
        }
        c.set(Calendar.MONTH, Calendar.JANUARY);
        c.set(Calendar.DATE, 1);
        c.set(Calendar.HOUR_OF_DAY, 0);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MILLISECOND, 0);
    }
}

Related

1. trimCalendar(Calendar cal)
2. trunc(Calendar calendar)
3. truncate(Calendar calendar)
4. truncateCal(final Calendar cal)
5. truncCalendar(Calendar c)