In this article, we will take a look at how to get the day of the week using the Java Date and Time API (Java 8 and above),
1. Get day of the week for LocalDateTime Object
With LocalDateTime you can make use of the getDayOfWeek() method to get the DayOfWeek,
import java.time.DayOfWeek;
import java.time.LocalDateTime;
public class Java8DayOfWeekExample1 {
public static void main(String[] args) {
LocalDateTime currentDateTime = LocalDateTime.now();
DayOfWeek dayOfWeek = currentDateTime.getDayOfWeek();
System.out.println(dayOfWeek);
}
}
SATURDAY
2. Get day of the week for LocalDate Object
import java.time.DayOfWeek;
import java.time.LocalDate;
public class Java8DayOfWeekExample2 {
public static void main(String[] args) {
LocalDate currentDateTime = LocalDate.now();
DayOfWeek dayOfWeek = currentDateTime.getDayOfWeek();
System.out.println(dayOfWeek);
}
}
MONDAY
3. Get day of the week for ZonedDateTime Object
import java.time.DayOfWeek;
import java.time.ZonedDateTime;
public class Java8DayOfWeekExample3 {
public static void main(String[] args) {
ZonedDateTime zonedDateTimeNow = ZonedDateTime.now();
DayOfWeek dayOfWeek = zonedDateTimeNow.getDayOfWeek();
System.out.println(dayOfWeek);
}
}
TUESDAY
4. Get day of the week for Instant Object
As Instant is associated with seconds or mill seconds, we need to convert it to a LocalDate/LocalDateTime/ZonalDateTime in order to get the week of the day!
import java.time.DayOfWeek;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
public class Java8DayOfWeekExample4 {
public static void main(String[] args) {
Instant instantNow = Instant.now();
DayOfWeek dayOfWeek = LocalDateTime.ofInstant(instantNow, ZoneId.of("UTC")).getDayOfWeek();
System.out.println(dayOfWeek);
}
SUNDAY
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