What is Duration.toNanos() in Java?

toNanos() is an instance method of the Duration class used to convert the duration to the total length in nanoseconds (expressed as a long).

The toNanos() method is defined in the Duration class. The Duration class is defined in the java.time package. To import the Duration class, check the following import statement:

import java.time.Duration;

Syntax


public long toNanos()

Parameters

The method has no parameters.

Return value

This method returns the total length of the duration in nanoseconds.

Code

In the code below, Duration class objects of different time units are converted to nanoseconds.

import java.time.Duration;
public class Main{
public static void main(String[] args) {
Duration durationInMilliSeconds = Duration.ofMillis(10000);
System.out.println("100 milliseconds in Nanoseconds - " + durationInMilliSeconds.toNanos());
Duration durationInMinutes = Duration.ofMinutes(10);
System.out.println("10 minutes in Nanoseconds - " + durationInMinutes.toNanos());
}
}