Java Calculate Number of Milliseconds Between two LocalDateTime

Tags: Java LocalDateTime ChronoUnit Java 8

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

How to get number of milliseconds between two LocalDateTime in Java

In Java, we can use the ChronoUnit.MILLIS.between() method to calculate the number of milliseconds between two LocalDateTime values as the example Java code below.

MillisecondsBetweenLocalDateTimeExample.java

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

public class MillisecondsBetweenLocalDateTimeExample {
    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 Milliseconds Between two LocalDateTime
        long numberOfMilliseconds = ChronoUnit.MILLIS.between(start, end);

        System.out.println(String.format("Number of milliseconds between %s and %s is %d", start, end, numberOfMilliseconds));
    }
}
The output as below.
Number of milliseconds between 2022-07-11T08:30 and 2022-07-11T09:30 is 3600000

Happy Coding 😊

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