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;

public class Main {

    public static Date getFirstDayOfWeek(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);//w ww.  j  ava  2 s  .c o m
        return getADayOfWeek(calendar, Calendar.MONDAY).getTime();
    }

    private static Calendar getADayOfWeek(Calendar day, int dayOfWeek) {
        int week = day.get(Calendar.DAY_OF_WEEK);
        if (week == dayOfWeek)
            return day;
        int diffDay = dayOfWeek - week;
        if (week == Calendar.SUNDAY) {
            diffDay -= 7;
        } else if (dayOfWeek == Calendar.SUNDAY) {
            diffDay += 7;
        }
        day.add(Calendar.DATE, diffDay);
        return day;
    }
}

Related

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