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 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);
}
} |
day of week for 2021-12-21 :2
Program 2:
// 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);
}
} |
day of week for 2018-05-31 :5
References: https://docs.oracle.com/javase/10/docs/api/java/time/temporal/WeekFields.html#dayOfWeek()