Instant plus() method in Java with Examples

In Instant class, there are two types of plus() method depending upon the parameters passed to it.

plus(long amountToAdd, TemporalUnit unit)

plus() method of a Instant class used to return a copy of this instant with the specified amount of unit added.If it is not possible to add the amount, because the unit is not supported or for some other reason, an exception is thrown. This instance is immutable and unaffected by this method call.

Syntax:

public Instant plus(long amountToAdd,
                    TemporalUnit unit)

Parameters: This method accepts two parameters amountToAdd which is the amount of the unit to add to the result, may be negative and unit which is the unit of the amount to add, not null.

Return value: This method returns Instant based on this instant with the specified amount added.

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

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// Java program to demonstrate
// Instant.plus() method
  
import java.time.*;
import java.time.temporal.ChronoUnit;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create an Instant object
        Instant instant
            = Instant.parse("2018-12-30T19:34:50.63Z");
  
        // add 30 DAYS to Instant
        Instant value
            = instant.plus(30, ChronoUnit.DAYS);
  
        // print result
        System.out.println("Instant after adding 30 DAYS: "
                           + value);
    }
}

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Output:

Instant after adding 30 DAYS: 2019-01-29T19:34:50.630Z

plus(TemporalAmount amountToAdd)

plus() method of a Instant class used to return a copy of this instant with the specified amount added to date-time.The amount is typically Period or Duration but may be any other type implementing the TemporalAmount interface.

Syntax:

public Instant plus(TemporalAmount amountToAdd)

Parameters: This method accepts one single parameter amountToAdd which is the amount to add, It should not be null.

Return value: This method returns Instant based on this instant with the addition made, not null

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

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code

// Java program to demonstrate
// Instant.plus() method
  
import java.time.*;
public class GFG {
    public static void main(String[] args)
    {
  
        // create a Instant object
        Instant inst
            = Instant.parse("2018-12-30T19:34:50.63Z");
  
        // add 20 Days to Instant
        Instant value
            = inst.plus(Period.ofDays(10));
  
        // print result
        System.out.println("Instant after adding Days: "
                           + value);
    }
}

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Output:

Instant after adding Days: 2019-01-09T19:34:50.630Z

References:
https://docs.oracle.com/javase/10/docs/api/java/time/Instant.html#plus(java.time.temporal.TemporalAmount)
https://docs.oracle.com/javase/10/docs/api/java/time/Instant.html#plus(long, java.time.temporal.TemporalUnit)



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