Java Week Day GetDayOfWeek(long p)

Description

Get Day Of Week

License

Apache License

Declaration

public static int GetDayOfWeek(long p) 

Method Source Code

//package com.java2s;
/*/*from w  w w .j  av a 2  s  .  c o  m*/
 * Encog(tm) Core v3.1 - Java Version
 * http://www.heatonresearch.com/encog/
 * http://code.google.com/p/encog-java/
    
 * Copyright 2008-2012 Heaton Research, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *   
 * For more information on Heaton Research copyrights, licenses 
 * and trademarks visit:
 * http://www.heatonresearch.com/copyright
 */

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

public class Main {
    public static final int YEAR_OFFSET = 10000;
    public static final int MONTH_OFFSET = 100;

    public static int GetDayOfWeek(long p) {
        Date t = long2Date(p);
        GregorianCalendar gc = new GregorianCalendar();
        gc.setTime(t);

        switch (gc.get(Calendar.DAY_OF_WEEK)) {
        case Calendar.SUNDAY:
            return 0;
        case Calendar.MONDAY:
            return 1;
        case Calendar.TUESDAY:
            return 2;
        case Calendar.WEDNESDAY:
            return 3;
        case Calendar.THURSDAY:
            return 4;
        case Calendar.FRIDAY:
            return 5;
        case Calendar.SATURDAY:
            return 6;
        default:
            // no way this should happen!
            return -1;
        }
    }

    public static Date long2Date(long l) {
        long rest = (long) l;
        int year = (int) (rest / YEAR_OFFSET);
        rest -= year * YEAR_OFFSET;
        int month = (int) (rest / MONTH_OFFSET);
        rest -= month * MONTH_OFFSET;
        int day = (int) rest;
        GregorianCalendar gc = new GregorianCalendar(year, month, day);
        return gc.getTime();
    }
}

Related

1. getDayOfWeek(Date start, int day)
2. getDayOfWeek(int _year, int _month, int _day)
3. getDayOfWeek(int year, int month, int day)
4. getDayOfWeek(long date)
5. getDayOfWeek(long date)
6. getDayOfWeek(String dat)
7. getDayOfWeek(String date)
8. getDayOfWeek(String year, String month, String day)
9. getDayOfWeekAbbreviation(int day)