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()