day of the week in Java

Question

PHP has a built-in function that takes a data and returns the day of the week it is (Monday, Tuesday, etc.). Does Java have a similar function?

Modern solution uses `java.time.LocalDate` and the `DayOfWeek` enum. Ex: `LocalDate.now().getDayOfWeek().getDisplayName( … )` — Basil Bourque, Oct 01 '18 at 00:44

ayush · Accepted Answer · 2018-10-04T21:36:26.733

5

Old style(pretty old..)

import java.util.*;

public class GetDay {
    public static void main(String[] args) {
        Calendar calendar = new GregorianCalendar();
        calendar.set(2011, 1, 9); // 1 = Feb  months are zero based remember
        System.out.println(calendar.get(Calendar.DAY_OF_WEEK));  
    }
}

In java-8 it could be as simple as

LocalDate.now().getDayOfWeek //get day of week for current day
LocalDate.of(2016, 01, 01).getDayOfWeek //get day of week for a particular day

This call return a DayOfWeek enum value which in itself has some nice functions.

edited Oct 04 '18 at 21:36

answered Feb 09 '11 at 05:10

ayush

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FYI, the terribly troublesome old date-time classes such as `java.util.Date`, [`java.util.Calendar`](https://docs.oracle.com/javase/10/docs/api/java/util/Calendar.html), and `java.text.SimpleDateFormat` are now [legacy](https://en.wikipedia.org/wiki/Legacy_system), supplanted by the [*java.time*](https://docs.oracle.com/javase/10/docs/api/java/time/package-summary.html) classes built into Java 8 and later. See [*Tutorial* by Oracle](https://docs.oracle.com/javase/tutorial/datetime/TOC.html). Ex: `LocalDate.now().getDayOfWeek().getDisplayName( … )` – Basil Bourque Oct 01 '18 at 00:43

score 4 · Answer 2 · answered Feb 09 '11 at 05:09

4

Yes Calendar.DAY_OF_WEEK

Calendar c=Calendar.getInstance();
switch (c.get(Calendar.DAY_OF_WEEK))
{
   case Calendar.MONDAY: ...;
   case Calendar.TUESDAY: ...;
}

answered Feb 09 '11 at 05:09

Aravind Yarram

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Ted Hopp · Answer 3 · 2011-02-09T05:17:49.900

4

java.util.Calendar.getInstance().get(Calendar.DAY_OF_WEEK);

edited Feb 09 '11 at 05:17

answered Feb 09 '11 at 05:10

Ted Hopp

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score 1 · Answer 4 · answered Feb 09 '11 at 05:13

You can use the Calendar class:

Example:

Calendar newCal = new GregorianCalendar();
newCal.set(1997, 2, 1, 0, 0, 0);
newCal.setTime(newCal.getTime());    
int day = newCal.get(Calendar.DAY_OF_WEEK);

Reference:

http://www.java-tips.org/java-se-tips/java.util/determine-the-day-of-the-week.html

day of the week in Java

4 Answers4