Java Week Day getFirstDayOfWeek(final Date date)

Here you can find the source of getFirstDayOfWeek(final Date date)

Description

get First Day Of Week

License

Open Source License

Declaration

public static Date getFirstDayOfWeek(final Date date) 

Method Source Code

//package com.java2s;
/*//from   ww w .  jav  a  2  s . co  m
 * #%L
 * Webstar Newsletter
 * %%
 * Copyright (C) 2013 Webstar Csoport Kft.
 * %%
 * 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.
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 * 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.
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 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import java.util.*;

public class Main {

    public static Date getFirstDayOfWeek(final Date date) {
        if (dayOfWeek(date) == 1) {
            return addDays(date, -6);
        }
        return addDays(date, -1 * (dayOfWeek(date) - 2));
    }

    public static int dayOfWeek(final Date date) {
        Calendar calendar = GregorianCalendar.getInstance();
        calendar.setTime(date);
        int weekday = calendar.get(Calendar.DAY_OF_WEEK);
        return weekday;
    }

    public static Date addDays(Date eredeti, int mennyit) {
        return add(eredeti, Calendar.DAY_OF_YEAR, mennyit);
    }

    public static Date add(Date eredeti, int mihez, int mennyit) {
        if (eredeti == null) {
            return null;
        }
        Calendar cal = new GregorianCalendar();
        cal.setTime(eredeti);
        cal.add(mihez, mennyit);

        return cal.getTime();
    }
}

Related

  1. getFirstDayOfLastWeek(Date date)
  2. getFirstDayOfWeek()
  3. getFirstDayOfWeek()
  4. getFirstDayOfWeek(Date date)
  5. getFirstDayOfWeek(Date date)
  6. getFirstDayOfWeek(String format)
  7. getFirstDayOfWeek(String str, int week)
  8. getFirstDayOfWeek(String week)
  9. getFirstDayOfWeek(String week)