The minusNanos() method of OffsetDateTime class in Java returns a copy of this OffsetDateTime with the specified number of nano-seconds subtracted from the parsed date and time.
Syntax:
public OffsetDateTime minusNanos(long nano-seconds)
Parameter: This method accepts a single parameter nano-seconds which specifies the nano-seconds to be subtracted from the parsed date. It can be negative also, in that case, it adds the number of nanoseconds to it.
Return Value: It returns an OffsetDateTime based on this date-time with the nano-seconds subtracted and not null.
Exceptions: The program throws a DateTimeException when it exceeds the supported data and time range.
Below programs illustrate the minusNanos() method:
Program 1:
// Java program to demonstrate the minusNanos() method  import java.time.OffsetDateTime;import java.time.ZonedDateTime;  public class GFG {    public static void main(String[] args)    {          // Parses the date1        OffsetDateTime date1            = OffsetDateTime                  .parse("2018-12-12T13:30:30+05:00");          // Prints dates        System.out.println("Date1: " + date1);          // Subtracts the number of nano-seconds        System.out.println("Date1 after subtracting nano-seconds: "                           + date1.minusNanos(-120));    }} |
Date1: 2018-12-12T13:30:30+05:00 Date1 after subtracting nano-seconds: 2018-12-12T13:30:30.000000120+05:00
Program 2:
// Java program to demonstrate the minusNanos() method  import java.time.OffsetDateTime;import java.time.ZonedDateTime;  public class GFG {    public static void main(String[] args)    {          // Parses the date1        OffsetDateTime date1            = OffsetDateTime                  .parse("2018-12-12T13:30:30+05:00");          // Prints dates        System.out.println("Date1: " + date1);          // Subtracts the number of nano-seconds        System.out.println("Date1 after subtracting nano-seconds: "                           + date1.minusNanos(140));    }} |
Date1: 2018-12-12T13:30:30+05:00 Date1 after subtracting nano-seconds: 2018-12-12T13:30:29.999999860+05:00
Reference: https://docs.oracle.com/javase/10/docs/api/java/time/OffsetDateTime.html#minusNanos(long)
