Java 8+ get Day of the Week Examples with LocalDateTime, DateTime, ZonalDateTime and Instant classes


Java Day of the Week Examples

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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