Java Calculate Number of Nanoseconds Between two LocalDateTime

Tags: Java LocalDateTime ChronoUnit Java 8

In this Java core tutorial, we learn how to calculate the number of nanoseconds between two LocalDateTime object using the java.time.temporal.ChronoUnit class in Java programming language.

How to get number of nanoseconds between two LocalDateTime in Java

In Java, we can use the ChronoUnit.NANOS.between() to calculate the number of nanoseconds between two LocalDateTime values as the following Java program.

NanosecondsBetweenLocalDateTimeExample.java

import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;

public class NanosecondsBetweenLocalDateTimeExample {
    public static void main(String... args) {
        LocalDateTime start = LocalDateTime.parse("2022-07-11T08:30:00");
        LocalDateTime end = LocalDateTime.parse("2022-07-11T09:30:00");

        // Calculate Number of Nanoseconds Between two LocalDateTime
        long numberOfNanoseconds = ChronoUnit.NANOS.between(start, end);

        System.out.println(String.format("Number of nanoseconds between %s and %s is %d", start, end, numberOfNanoseconds));
    }
}
The output as below.
Number of nanoseconds between 2022-07-11T08:30 and 2022-07-11T09:30 is 3600000000000

Happy Coding 😊

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