Java Day Of Year getFirstDayOfYear(int year)

Description

get First Day Of Year

License

LGPL

Declaration

public static Date getFirstDayOfYear(int year) 

Method Source Code

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

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

public class Main {

    public static Date getFirstDayOfYear(int year) {
        return getFirstDayOfQuarter(year, 1);
    }//from  w w w.  j  av  a2  s  . c  o m

    public static Date getFirstDayOfQuarter(int year, int quarter) {
        int month = 0;
        if (quarter > 4) {
            return null;
        } else {
            month = (quarter - 1) * 3 + 1;
        }
        return getFirstDayOfMonth(year, month);
    }

    public static Date getFirstDayOfMonth(int year, int month) {
        Calendar c = Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month - 1);
        c.set(Calendar.DAY_OF_MONTH, c.getActualMinimum(Calendar.DAY_OF_MONTH));
        c.set(Calendar.HOUR, 0);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MILLISECOND, 0);
        return c.getTime();
    }
}

Related

1. getDaysInYear(int year)
2. getDaysInYear(int year)
3. getDaysOfYear(int year)
4. getEndTimeOfYear(int year)
5. getFirstDayOfTheYear(int year)
6. getLastYearOfToday()
7. getMaxDayByYearMonth(String ym)
8. getMaxDayOfYearMonth(String date)
9. getMaxWeekNumOfYear(int year)