WeekFields dayOfWeek() method in Java with Examples

Last Updated : 29 Jan, 2020

The dayOfWeek() method of WeekFields class is used to return a field to access the day of the week based on this WeekFields. For example, if the first day-of-week is Monday, then that will have the value 1, with other days ranging from Tuesday as 2 to Sunday as 7. Syntax:

public TemporalField dayOfWeek()

Parameters: This method accepts nothing. Return value: This method returns a field providing access to the day-of-week with localized numbering, not null. Below programs illustrate the WeekFields.dayOfWeek() method: Program 1:

Java

// Java program to demonstrate
// WeekFields.dayOfWeek() method

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.temporal.TemporalField;
import java.time.temporal.WeekFields;

public class GFG {
    public static void main(String[] args)
    {

        // create WeekFields
        WeekFields weekFields
            = WeekFields.of(DayOfWeek.MONDAY, 1);

        // apply dayOfWeek()
        TemporalField dayOfWeek
            = weekFields.dayOfWeek();

        // create a LocalDate
        LocalDate day = LocalDate.of(2021, 12, 21);

        // get day of week for localdate
        int dow = day.get(dayOfWeek);

        // print results
        System.out.println("day of week for "
                           + day + " :" + dow);
    }
}

Output:

day of week for 2021-12-21 :2

Program 2:

Java

// Java program to demonstrate
// WeekFields.dayOfWeek() method

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.temporal.TemporalField;
import java.time.temporal.WeekFields;

public class GFG {
    public static void main(String[] args)
    {

        // create WeekFields
        WeekFields weekFields
            = WeekFields.of(DayOfWeek.SUNDAY, 1);

        // apply dayOfWeek()
        TemporalField dayOfWeek
            = weekFields.dayOfWeek();

        // create a LocalDate
        LocalDate day
            = LocalDate.of(2018, 05, 31);

        // get day of week for localdate
        int dow = day.get(dayOfWeek);

        // print results
        System.out.println("day of week for "
                           + day + " :" + dow);
    }
}