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Java Instant Class | plusMillis() Method with Example

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

Instant Class plusMillis() method

  • plusMillis() method is available in java.time package.
  • plusMillis() method is used to add the given duration in milliseconds to this Instant and return the Instant.
  • plusMillis() 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.
  • plusMillis() method may throw an exception at the time of performing addition.
    DateTimeException: This exception may throw when this Instant value reaches out of the min or max instant.

Syntax:

    public Instant plusMillis(long millis_val);

Parameter(s):

  • long millis_val – represents the milliseconds value to add to this Instant.

Return value:

The return type of this method is Instant, it returns the Instant that holds the value added the given milliseconds to this Instant.

Example:

// Java program to demonstrate the example 
// of plusMillis(long millis_val) method 
// of Instant

import java.time.*;

public class PlusMillisOfInstant {
    public static void main(String args[]) {
        long millis = 20000;

        // Instantiates two Instant
        Instant ins1 = Instant.parse("2006-04-03T05:10:15.00Z");
        Instant ins2 = Instant.now();

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

        System.out.println();

        // Here, this method adds the given duration
        // in milliseconds with this Instant ins1 
        // i.e. here we are adding the given 20000
        // milliseconds with this ins1 

        Instant plus_millis = ins1.plusMillis(millis);

        // Display plus_millis
        System.out.println("ins1.plusMillis(millis): " + plus_millis);

        // Here, this method adds the given duration
        // in milliseconds with this Instant ins2 
        // i.e. here we are adding the given 20000 
        // milliseconds with this ins2 

        plus_millis = ins2.plusMillis(millis);

        // Display plus_millis
        System.out.println("ins2.plusMillis(millis): " + plus_millis);
    }
}

Output

Instant ins1 and ins2: 
ins1: 2006-04-03T05:10:15Z
ins2: 2020-05-27T00:07:38.429608Z
millis to add: 20000

ins1.plusMillis(millis): 2006-04-03T05:10:35Z
ins2.plusMillis(millis): 2020-05-27T00:07:58.429608Z
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