Java Calendar setFirstDayOfWeek() Method

The SetFirstDayOfWeek() method of Calendar class is used to set the first day of the week. The value which is to be set as the first day of the week is passed as the parameter.

Syntax

Parameter

value - It is to be set as the first day of the week.

Returns

Throws

Example 1

import java.util.Calendar;
public class JavaCalendarsetFirstDayOfWeekExample1 {
public static void main(String[] args) {
  Calendar calobj = Calendar.getInstance(); 
  System.out.println("first day of current week:"+ calobj.getFirstDayOfWeek());
  calobj.setFirstDayOfWeek(5);
  System.out.println("Date is " + calobj.getTime() +   " so first day of week  is " + calobj.getFirstDayOfWeek()); 
  calobj.setFirstDayOfWeek(Calendar.TUESDAY);
  System.out.println("Date is " + calobj.getTime() + "  then first day of week :" + calobj.getFirstDayOfWeek());
}
}

Test it Now

Output:

first day of current week:1
Date is Wed Aug 15 17:57:56 PDT 2018 so first day of week  is 5
Date is Wed Aug 15 17:57:56 PDT 2018  then first day of week :3

Example 2

import java.util.Calendar;
import java.util.Locale;
public class JavaCalendarsetFirstDayOfWeekExample2 {
public static void main(String[] args) {
    Calendar mycal = Calendar.getInstance(new Locale("us"));
     mycal.setFirstDayOfWeek(3);
     int first = mycal.getFirstDayOfWeek();
     System.out.println(" First Day Of week is :" + mycal.getFirstDayOfWeek() );
    //checking if first day is monday or not
    if (first != Calendar.MONDAY) {
         System.out.println("First day of week should be monday !!");
    }
    Calendar mycal2 = Calendar.getInstance(new Locale("uk","UA"));
    int first2 = mycal2.getFirstDayOfWeek();
     mycal.setFirstDayOfWeek(Calendar.YEAR);
    if ( first2 == Calendar.MONDAY) {
        System.out.println(" in uk local  First day of week is Monday  !!");
    }
}
}

Test it Now

Output:

First Day Of week is :3
First day of week should be monday !!
 in uk local  First day of week is Monday  !!

Example 3

import java.util.Calendar;
public class JavaCalendarSetFirstDayOfWeekExample3 {
    public static void main(String[] args) {
      // create a new calendar 
      Calendar mycal = Calendar.getInstance();
      // print the first day of the week
      System.out.println("First day is :" + mycal.getFirstDayOfWeek());
      mycal.setFirstDayOfWeek(7);
      int firsD = mycal.getFirstDayOfWeek();
      switch(firsD) {
         case 1:
         case 2:
         case 3:
            System.out.println(" After changing First Day of Week can be following : Monday , Tuesday , wednasday");
            break;
         case 4:
         case 5:  
         case 6:
            System.out.println(" After changing First Day of Week can be following : Thirsday , Friday , saturday");
            break;
         case 7:
            System.out.println(" After changing First Day is Sunday");
            break;
      }
   }
}

Test it Now

Output:

First day is :1
 After changing First Day is Sunday

Next TopicJava Calendar Class

← prev next →

Help Others, Please Share

Javatpoint Services

JavaTpoint offers too many high quality services. Mail us on [email protected], to get more information about given services.

Website Designing
Website Development
Java Development
PHP Development
WordPress
Graphic Designing
Logo
Digital Marketing
On Page and Off Page SEO
PPC
Content Development
Corporate Training
Classroom and Online Training
Data Entry

Training For College Campus

JavaTpoint offers college campus training on Core Java, Advance Java, .Net, Android, Hadoop, PHP, Web Technology and Python. Please mail your requirement at [email protected].
Duration: 1 week to 2 week

^{Like/Subscribe us for latest updates or newsletter}