Java Convert LocalTime to Nanos of Day

Tags: Java LocalTime Java 8

In this Java core tutorial we learn how to convert a java.time.LocalTime object into number of nanos of day in Java programming language.

How to convert a LocalTime to Nanos of Day

With a given LocalTime object in Java we can use the toNanoOfDay() method to extracts the time as nanos of day. In the following Java program we learn how to use the LocalTime.toNanoOfDay() method to convert a LocalTime object into number of nanos of day.

ConvertLocalTimeToNanoOfDayExample1.java 

import java.time.LocalTime;

public class ConvertLocalTimeToNanoOfDayExample1 {
    public static void main(String... args) {
        int hour = 1;
        int minute = 10;
        int second = 20;
        int nanoOfSecond = 100;

        LocalTime localTime = LocalTime.of(hour, minute, second, nanoOfSecond);
        long nanoOfDay = localTime.toNanoOfDay();

        System.out.println("LocalTime: " + localTime);
        System.out.println("Nano of Day: " + nanoOfDay);
    }
}
The output as below. 
LocalTime: 01:10:20.000000100
Nano of Day: 4220000000100

Happy Coding 😊

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