ZonedDateTime minusNanos() method in Java with Examples

0 1 1 minute read

minusNanos() method of a ZonedDateTime class used to subtract the number of nanoseconds from this ZonedDateTime and return a copy of ZonedDateTime after subtraction.This method works on the instant timeline and subtracting one nanosecond return the timeline of one nanosecond earlier. 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 minusNanos(long nanoseconds)

Parameters: This method accepts a single parameter nanoseconds which represents the nanoseconds to subtract, It can be negative.

Return value: This method returns a ZonedDateTime based on this date-time with the nanoseconds subtracted.

Exception: This method throws DateTimeException if the result exceeds the supported date range.

Below programs illustrate the minusNanos() method:
Program 1:

// Java program to demonstrate
// ZonedDateTime.minusNanos() 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"
                           + " subtracting nanoseconds: "
                           + zoneddatetime);
  
        // subtract 30000000 nanoseconds
        ZonedDateTime returnvalue
            = zoneddatetime.minusNanos(30000000);
  
        // print result
        System.out.println("ZonedDateTime after "
                           + " subtracting 30000000 nanoseconds: "
                           + returnvalue);
    }
}

Output:

ZonedDateTime before subtracting nanoseconds: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]ZonedDateTime after subtracting 30000000 nanoseconds: 2018-12-06T19:21:12.093+05:30[Asia/Calcutta]

Program 2:

// Java program to demonstrate
// ZonedDateTime.minusNanos() 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"
                           + " subtracting nanoseconds: "
                           + zoneddatetime);
  
        // subtract 52000000 nanoseconds
        ZonedDateTime returnvalue
            = zoneddatetime.minusNanos(52000000);
  
        // print result
        System.out.println("ZonedDateTime after "
                           + " subtracting 52000000 nanoseconds: "
                           + returnvalue);
    }
}

Output:

ZonedDateTime before subtracting nanoseconds: 2018-10-25T23:12:31.123+02:00[Europe/Paris]ZonedDateTime after subtracting 52000000 nanoseconds: 2018-10-25T23:12:31.071+02:00[Europe/Paris]

Reference: https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#minusNanos(long)