Java Day of Week Day_Of_Week(String Date, int DayCase)

Description

Da O Week

License

Open Source License

Parameter

Parameter	Description
Date	a parameter
DayCase	a parameter

Declaration

public static String Day_Of_Week(String Date, int DayCase)

    

Method Source Code

//package com.java2s;
/*/*from  w  ww. j  av a 2s  .  c  o m*/
 * Created on Oct 23, 2003
 *
 * Copyright (c) 2005 Derone Bryson
 *
 * 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 2, 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 software; see the file COPYING. If not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 * 
 * As a special exception, Derone Bryson and the StopMojo Project gives 
 * permission for additional uses of the text contained in its release of 
 * StopMojo.
 *
 * The exception is that, Derone Bryson and the the StopMojo Project hereby 
 * grants permission for non-GPL compatible modules (jar files, libraries, 
 * codecs, etc.) to be used and distributed together with StopMojo. This 
 * permission is above and beyond the permissions granted by the GPL license 
 * StopMojo is covered by.
 *
 * This exception does not however invalidate any other reasons why the 
 * executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by Derone Bryson and/or the
 * StopMojo Project under the name StopMojo. If you copy code from other Free 
 * Software Foundation releases into a copy of StopMojo, as the General Public 
 * License permits, the exception does not apply to the code that you add in 
 * this way. To avoid misleading anyone as to the status of such modified files, 
 * you must delete this exception notice from them.
 *
 * If you write modifications of your own for StopMojo, it is your choice 
 * whether to permit this exception to apply to your modifications. If you do 
 * not wish that, delete this exception notice.  
 */

public class Main {
    private static String[] DOW = { "sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday" };

    /**
     * 
     * @param Date
     * @param DayCase
     * @return
     */
    public static String Day_Of_Week(String Date, int DayCase)
    /*
     * Returns the day of the week in *Buffer for the calendar date passed in
     * *Date in the form MM/DD/YY. The following formats are selected by
     * DayCase: DayCase = 1 - MON, TUE, WED, THU... DayCase = 2 - Mon, Tue, Wed,
     * Thu... DayCase = 3 - mon, tue, wed, thu... DayCase = 4 - MONDAY, TUESDAY,
     * WEDNESDAY.... DayCase = 5 - Monday, Tuesday, Wednesday.... DayCase = 6 -
     * monday, tuesday, wednesday....
     */
    {/* Day_Of_Week */
        StringBuffer dow = new StringBuffer(
                DOW[(int) (Math.floor((Cal_Julian(Date) + 2) - (Math.floor((Cal_Julian(Date) + 2) / 7) * 7)))]);

        /* If DayCase 1, 2, or 3 copy only first 3 characters of day name */
        if ((DayCase == 1) || (DayCase == 2) || (DayCase == 3))
            dow = new StringBuffer(dow.substring(0, 3));

        switch (DayCase) {
        case 1:
        case 4:
            /* Uppercase full name */
            return dow.toString().toUpperCase();

        case 2:
        case 5:
            /* Uppercase first letter only */
            dow.setCharAt(0, Character.toUpperCase(dow.charAt(0)));
            return dow.toString();
        } /* switch */
        return "";
    }

    /**
     * 
     * @param DateVar
     * @return
     */
    public static double Cal_Julian(String DateVar) {
        double MonthV, /* Month value */
                YearV, /* Year value */
                DayV, /* Day value */
                Yl; /* Temporary work variables */

        /* Parse out the month, day, and year */
        YearV = atof(DateVar.substring(6));
        DayV = atof(DateVar.substring(3));
        MonthV = atof(DateVar);
        /* Adjust for the 20th century */
        if (YearV < 50.0) /* = 40.0) */
            YearV += 2000;
        else
            YearV += 1900;

        Yl = YearV + (MonthV - 2.85) / 12;
        return (Math.floor(
                Math.floor(Math.floor(367.0 * Yl) - Math.floor(Yl) - 0.75 * Math.floor(Yl) + DayV) - 0.75 * 2.0)
                + 1721115.0);
    }

    /**
     * Returns the double value of s.
     * 
     * @param s
     *            the string containing the floating point number
     * @return the value of the floating point number in s
     */
    public static double atof(String s) {
        int i, numMinuses = 0, numDots = 0;

        s = s.trim();
        for (i = 0; i < s.length()
                && (s.charAt(i) == '-' || s.charAt(i) == '.' || Character.isDigit(s.charAt(i))); i++)
            if (s.charAt(i) == '-')
                numMinuses++;
            else if (s.charAt(i) == '.')
                numDots++;

        if (i != 0 && numMinuses < 2 && numDots < 2)
            return Double.parseDouble(s.substring(0, i));

        return 0.0;
    }
}

Related

1. calculateBusinessDays(Date startDate, Date endDate, int firstWeekendDay, int secondWeekendDay)
2. dayForWeek(String pTime)
3. dayForWeek(String pTime)
4. dayForWeek(String weeks)
5. dayNumberOfWeek(Date date)