ZonedDateTime plusNanos() method in Java with Examples Last Updated : 10 Dec, 2018 Comments Improve Suggest changes Like Article Like Report plusNanos() method of a ZonedDateTime class used to add the number of nanoseconds in this ZonedDateTime and return a copy of ZonedDateTime after addition.This method works on the instant time-line and adding one nanosecond return the time-line of one nanosecond later. Note that this method is a different approach to that used by days, months and years. This instance is immutable and unaffected by this method call. Syntax: public ZonedDateTime plusNanos(long nanoseconds) Parameters: This method accepts a single parameter nanoseconds which represents the nanoseconds to add, It can be negative. Return value: This method returns a ZonedDateTime based on this date-time with the nanoseconds added. Exception: This method throws DateTimeException if the result exceeds the supported date range. Below programs illustrate the plusNanos() method: Program 1: Java // Java program to demonstrate // ZonedDateTime.plusNanos() method import java.time.*; public class GFG { public static void main(String[] args) { // create a ZonedDateTime object ZonedDateTime zoneddatetime = ZonedDateTime.parse( "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]"); // print instance System.out.println("ZonedDateTime before" + " adding nanoseconds: " + zoneddatetime); // add 30000000 nanoseconds ZonedDateTime returnvalue = zoneddatetime.plusNanos(30000000); // print result System.out.println("ZonedDateTime after " + " adding nanoseconds: " + returnvalue); } } Output: ZonedDateTime before adding nanoseconds: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta] ZonedDateTime after adding nanoseconds: 2018-12-06T19:21:12.153+05:30[Asia/Calcutta] Program 2: Java // Java program to demonstrate // ZonedDateTime.plusNanos() method import java.time.*; public class GFG { public static void main(String[] args) { // create a ZonedDateTime object ZonedDateTime zoneddatetime = ZonedDateTime.parse( "2018-10-25T23:12:31.123+02:00[Europe/Paris]"); // print instance System.out.println("ZonedDateTime before" + " adding nanoseconds: " + zoneddatetime); // add 5200000 nanoseconds ZonedDateTime returnvalue = zoneddatetime.plusNanos(5200000); // print result System.out.println("ZonedDateTime after " + " adding nanoseconds: " + returnvalue); } } Output: ZonedDateTime before adding nanoseconds: 2018-10-25T23:12:31.123+02:00[Europe/Paris] ZonedDateTime after adding nanoseconds: 2018-10-25T23:12:31.128200+02:00[Europe/Paris] Reference: https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#plusNanos(long) Comment More infoAdvertise with us Next Article Introduction to Java A AmanSingh2210 Follow Improve Article Tags : Java Java-Functions Java-time package Java-ZonedDateTime Practice Tags : Java Similar Reads Java Tutorial Java is a high-level, object-oriented programming language used to build web apps, mobile applications, and enterprise software systems. 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