public Instant plusNanos(long nanosToAdd)

// Java program to demonstrate
// Instant.plusNanos() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a Instant object
        Instant instant
            = Instant.parse("2018-10-28T19:34:50.63Z");
  
        // addition of 840000000 nanoseconds
        // means .84 seconds to this instant
        Instant returnedValue
            = instant.plusNanos(840000000);
  
        // print result
        System.out.println("Returned Instant: "
                           + returnedValue);
    }
}

Returned Instant: 2018-10-28T19:34:51.470Z

// Java program to demonstrate
// Instant.plusNanos() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a Instant object
        Instant instant = Instant.now();
  
        // current Instant
        System.out.println("Current instant: "
                           + instant);
  
        // addition of 430000000 nanoseconds
        // means .43 seconds to this instant
        Instant returnedValue
            = instant.plusNanos(430000000);
  
        // print result
        System.out.println("Returned Instant: "
                           + returnedValue);
    }
}

Current instant: 2018-11-28T05:32:40.818Z
Returned Instant: 2018-11-28T05:32:41.248Z