# Duration minusNanos() method in Java

Java 8ProgrammingObject Oriented Programming

An immutable copy of a duration where some nanoseconds are removed from it can be obtained using the minusNanos() method in the Duration class in Java. This method requires a single parameter i.e. the number of nanoseconds to be subtracted and it returns the duration with the subtracted nanoseconds.

A program that demonstrates this is given as follows −

## Example

Live Demo

import java.time.Duration;
public class Demo {
public static void main(String[] args) {
Duration d = Duration.ofSeconds(1);
System.out.println("The duration is: " + d);
System.out.println("A copy with 100 nano seconds removed from the duration is: " + d.minusNanos(100));
}
}

## Output

The duration is: PT1S
A copy with 100 nano seconds removed from the duration is: PT0.9999999S

Now let us understand the above program.

First, the duration is displayed. Then an immutable copy of the duration where 100 nanoseconds are removed is obtained using the minusNanos() method and this is displayed. A code snippet that demonstrates this is as follows −

Duration d = Duration.ofSeconds(1);
System.out.println("The duration is: " + d);
System.out.println("A copy with 100 nano seconds removed from the duration is: " + d.minusNanos(100));
Published on 13-Mar-2019 12:46:44