Java Week End getFirstDayOfWeek(Date date)

Description

get First Day Of Week

License

Apache License

Declaration

public static Date getFirstDayOfWeek(Date date) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

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

public class Main {

    public static Date getFirstDayOfWeek(Date date) {
        Calendar c = new GregorianCalendar();
        c.setFirstDayOfWeek(Calendar.MONDAY);
        c.setTime(date);/*from w w  w . j  ava 2  s . c o m*/
        c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek());
        return c.getTime();
    }

    public static Date getFirstDayOfWeek(int year, int week) {
        Calendar calFirst = Calendar.getInstance();
        calFirst.set(year, 0, 7);
        Date firstDate = getFirstDayOfWeek(calFirst.getTime());

        Calendar firstDateCal = Calendar.getInstance();
        firstDateCal.setTime(firstDate);

        Calendar c = new GregorianCalendar();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, Calendar.JANUARY);
        c.set(Calendar.DATE, firstDateCal.get(Calendar.DATE));

        Calendar cal = (GregorianCalendar) c.clone();
        cal.add(Calendar.DATE, (week - 1) * 7);
        firstDate = getFirstDayOfWeek(cal.getTime());

        return firstDate;
    }
}

Related

1. getFirstDayOfWeek(Date date)
2. getFirstDayOfWeek(Date date)
3. getFirstDayOfWeek(Date date)
4. getFirstDayOfWeekFromMonday(Date now)