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Java Instant Class | minusNanos() Method with Example

Instant Class minusNanos() method: Here, we are going to learn about the minusNanos() method of Instant Class with its syntax and example.
Submitted by Preeti Jain, on May 26, 2020

Instant Class minusNanos() method

• minusNanos() method is available in java.time package.
• minusNanos() method is used to subtract the given duration in nanoseconds from this Instant and returns the Instant.
• 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.
  ArithmeticException: This exception may throw when the calculated result value exceeds the limit.

Syntax:

    public Instant minusNanos(long nanos_val);

Parameter(s):

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

Return value:

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

Example:

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

import java.time.*;

public class MinusNanosOfInstant {
    public static void main(String args[]) {
        long nanos = 200000;

        // Instantiates two Instant
        Instant ins1 = Instant.parse("2006-04-03T05:10:15.60Z");
        Instant ins2 = Instant.now();

        // Display ins1,ins2 and nanos
        System.out.println("Instant ins1 and ins2: ");
        System.out.println("ins1: " + ins1);
        System.out.println("ins2: " + ins2);
        System.out.println("nanos to substract: " + nanos);

        System.out.println();

        // Here, this method subtracts the given duration
        // in nanoseconds from this Instant ins1 
        // i.e. here we are substracting the given
        // 200000 nanos from this ins1 

        Instant minus_nanos = ins1.minusNanos(nanos);

        // Display minus_nanos
        System.out.println("ins1.minusNanos(nanos): " + minus_nanos);

        // Here, this method subtracts the given duration
        // in nanoseconds from this Instant ins2 
        // i.e. here we are substracting the given
        // 200000 nanos from this ins2 

        minus_nanos = ins2.minusNanos(nanos);

        // Display minus_nanos
        System.out.println("ins2.minusNanos(nanos): " + minus_nanos);
    }
}

Output

Instant ins1 and ins2: 
ins1: 2006-04-03T05:10:15.600Z
ins2: 2020-05-26T23:36:39.457119Z
nanos to substract: 200000

ins1.minusNanos(nanos): 2006-04-03T05:10:15.599800Z
ins2.minusNanos(nanos): 2020-05-26T23:36:39.456919Z