The adjustInto() method of java.time.DayOfWeek is an in-built function in Java which takes a Temporal object specifying a date and returns a new Temporal object of the same observable type as the input with the day-of-week changed to be the same as specified DayOfWeek constant. Note that this method adjusts forwards or backwards within a Monday to Sunday week.
Method Declaration:
public Temporal adjustInto(Temporal temporal)
Syntax:
Temporal newLocalDate = DayOfWeek.ANYWEEKDAY.adjustInto(Temporal temporal)
Parameters: This method takes temporal as parameter where:
Return Value: The function returns an adjusted Temporal object which is the date adjusted according to specified Day of the Week.
Below programs illustrate the above method:
Program 1:
import java.time.*;
import java.time.DayOfWeek;
import java.time.temporal.Temporal;
class DayOfWeekExample {
public static void main(String[] args)
{
// Set a Local Date whose day is found
LocalDate localDate1
= LocalDate.of( 1947 , Month.AUGUST, 15 );
// Find the day from the Local Date
DayOfWeek dayOfWeek1
= DayOfWeek.from(localDate1);
// Printing the Local Date
System.out.println(localDate1
+ " which is "
+ dayOfWeek1.name());
// Adjust the Date to Monday from Friday
Temporal localDate2
= DayOfWeek.MONDAY
.adjustInto(localDate1);
// Find the day from the new Local date
DayOfWeek dayOfWeek2
= DayOfWeek.from(localDate2);
// Printing the new Local Date
System.out.println(localDate2
+ " which is "
+ dayOfWeek2.name());
}
} |
1947-08-15 which is FRIDAY 1947-08-11 which is MONDAY
Program 2:
import java.time.*;
import java.time.DayOfWeek;
import java.time.temporal.Temporal;
class DayOfWeekExample {
public static void main(String[] args)
{
// Set a Local Date whose day is found
LocalDate localDate1
= LocalDate.of( 2019 , Month.MARCH, 18 );
// Find the day from the Local Date
DayOfWeek dayOfWeek1
= DayOfWeek.from(localDate1);
// Printing the Local Date
System.out.println(localDate1
+ " which is "
+ dayOfWeek1.name());
// Adjust the Date to Wednesday from Monday
Temporal localDate2
= DayOfWeek.WEDNESDAY
.adjustInto(localDate1);
// Find the day from the new Local date
DayOfWeek dayOfWeek2
= DayOfWeek.from(localDate2);
// Printing the new Local Date
System.out.println(localDate2
+ " which is "
+ dayOfWeek2.name());
}
} |
2019-03-18 which is MONDAY 2019-03-20 which is WEDNESDAY