Java Calculate Number of Hours Between two ZonedDateTime

Tags: Java ZonedDateTime ChronoUnit Java 8

In this Java core tutorial, we learn how to write Java program to calculate the number of hours between two ZonedDateTime objects using the java.time.temporal.ChronoUnit class in Java programming language.

How to get number of hours between two ZonedDateTime in Java

In Java, we can use the ChronoUnit.HOURS.between() method to calculate the number of hours between two ZonedDateTime values as the example Java code below.

HoursBetweenZonedDateTimeExample.java 

import java.time.ZonedDateTime;
import java.time.temporal.ChronoUnit;

public class HoursBetweenZonedDateTimeExample {
    public static void main(String... args) {
        ZonedDateTime startZonedDateTime = ZonedDateTime.parse("2022-01-01T08:15:30+10:00[Australia/Sydney]");
        ZonedDateTime endZonedDateTime = ZonedDateTime.parse("2022-01-02T08:15:30+10:00[Australia/Sydney]");

        // Calculate Number of Hours Between two ZonedDateTime
        long numberOfHours = ChronoUnit.HOURS.between(startZonedDateTime, endZonedDateTime);

        System.out.println(String.format("Number of hours between %s and %s is %d",
                startZonedDateTime,
                endZonedDateTime,
                numberOfHours));

    }
}
The output as below. 
Number of hours between 2022-01-01T09:15:30+11:00[Australia/Sydney] and 2022-01-02T09:15:30+11:00[Australia/Sydney] is 24

Happy Coding 😊

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