Java Week Day getDay(long date, int startOfWeek, int increment)

Description

get Day

License

Open Source License

Declaration

private static long getDay(long date, int startOfWeek, int increment) 

Method Source Code

//package com.java2s;
/*/*from  w w w.j  a va 2  s  .c  o m*/
 * $Id: DateUtils.java,v 1.1 2004/08/12 00:24:33 dmouse Exp $
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

import java.util.*;

public class Main {
    private static Calendar CALENDAR = Calendar.getInstance();

    private static long getDay(long date, int startOfWeek, int increment) {
        Calendar calendar = CALENDAR;
        synchronized (calendar) {
            calendar.setTimeInMillis(date);
            int day = calendar.get(Calendar.DAY_OF_WEEK);
            // Normalize the view starting date to a week starting day
            while (day != startOfWeek) {
                calendar.add(Calendar.DATE, increment);
                day = calendar.get(Calendar.DAY_OF_WEEK);
            }
            return startOfDayInMillis(calendar.getTimeInMillis());
        }
    }

    /**
    * Returns day in millis with the hours, milliseconds, seconds and minutes
    * set to 0.
    *
    * @param date long used in calculating start of day
    * @return Start of <code>date</code>
    */
    public static long startOfDayInMillis(long date) {
        Calendar calendar = CALENDAR;
        synchronized (calendar) {
            calendar.setTimeInMillis(date);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            return calendar.getTimeInMillis();
        }
    }
}

Related

1. getCurrentDayOfWeekArabia()
2. getCurrentDayOfWeekEnglish()
3. getCurWeek(String day)
4. getCurWeekDayByStr(String curday)
5. getCurWeekDayByStr(String curday)
6. getDayNextWeek()
7. getDayOfTheWeekFromNow(int nDays)
8. getDayOfWeek()
9. getDayOfWeek(Date date)