Home » Java » Java Reference » Java LocalDateTime Class

Java LocalDateTime Class | minusNanos() Method with Example

LocalDateTime Class minusNanos() method: Here, we are going to learn about the minusNanos() method of LocalDateTime Class with its syntax and example.
Submitted by Preeti Jain, on June 07, 2020

LocalDateTime Class minusNanos() method

• minusNanos() method is available in java.time package.
• minusNanos() method is used to subtract the given nanoseconds from this date-time and return the LocalDateTime.
• minusNanos() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• minusNanos() method may throw an exception at the time of performing subtraction.
  DateTimeException – This exception may throw when the calculated result value exceeds the limit.

Syntax:

    public LocalDateTime minusNanos(long nanos_val);

Parameter(s):

• long nanos_val – represents the nanoseconds to be subtracted from this LocalDateTime.

Return value:

The return type of this method is LocalDateTime, it returns the LocalDateTime that holds the value subtracted the given nanoseconds from this LocalDateTime.

Example:

// Java program to demonstrate the example 
// of minusNanos(long nanos_val) method 
// of LocalDateTime

import java.time.*;

public class MinusNanosOfLocalDateTime {
    public static void main(String args[]) {
        long nanos = 30000;
        // Instantiates two LocalDateTime
        LocalDateTime da_ti1 = LocalDateTime.parse("2005-10-05T10:10:10.00");
        LocalDateTime da_ti2 = LocalDateTime.now();

        // Display da_ti1, da_ti2 and
        // nanos
        System.out.println("LocalDateTime da_ti1 and da_ti2: ");
        System.out.println("da_ti1: " + da_ti1);
        System.out.println("da_ti2: " + da_ti2);
        System.out.println("nanos to subtract: " + nanos);

        System.out.println();

        // Here, this method subtracts the given 
        // nanoseconds from this date-time object
        // i.e. here we are subracting 30000 
        // nanoseconds from this object da_ti1
        LocalDateTime minus_nanos = da_ti1.minusNanos(nanos);

        // Display minus_nanos
        System.out.print("da_ti1.minusNanos(nanos): ");
        System.out.println(minus_nanos);

        // Here, this method subtracts the given
        // nanoseconds from this date-time object 
        // i.e. here we are subracting 30000
        // nanoseconds from this object da_ti2
        minus_nanos = da_ti2.minusNanos(nanos);

        // Display minus_nanos
        System.out.print("da_ti2.minusNanos(nanos): ");
        System.out.println(minus_nanos);
    }
}

Output

LocalDateTime da_ti1 and da_ti2: 
da_ti1: 2005-10-05T10:10:10
da_ti2: 2020-06-07T16:25:24.871114
nanos to subtract: 30000

da_ti1.minusNanos(nanos): 2005-10-05T10:10:09.999970
da_ti2.minusNanos(nanos): 2020-06-07T16:25:24.871084