OptionalInt ifPresent(IntConsumer) method in Java with examples

The ifPresentOrElse(java.util.function.IntConsumer) method helps us to perform the specified IntConsumer action the value of this OptionalInt object. If a value is not present in this OptionalInt, then this method does nothing.

Syntax:

public void ifPresentOrElse(IntConsumer action)

Parameters: This method accepts a parameter action which is the action to be performed on this Optional, if a value is present.

Return value: This method returns nothing.

Exception: This method throw NullPointerException if a value is present and the given action is null.

Below programs illustrate ifPresent(IntConsumer) method:

Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// OptionalInt.ifPresent(IntConsumer) method
  
import java.util.OptionalInt;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a OptionalInt
        OptionalInt opint = OptionalInt.of(2234);
  
        // apply ifPresent(IntConsumer)
        opint.ifPresent((value) -> {
            value = value * 2;
            System.out.println("Value after modification:=> "
                               + value);
        });
    }
}

chevron_right


Output:

Program 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// OptionalInt.ifPresent(IntConsumer) method
  
import java.util.OptionalInt;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a OptionalInt
        OptionalInt opint = OptionalInt.empty();
  
        // apply ifPresent(IntConsumer)
        opint.ifPresent((value) -> {
            value = value * 2;
            System.out.println("Value after modification:=> "
                               + value);
        });
  
        System.out.println("As OptionalInt is empty value"
                           + " is not modified");
    }
}

chevron_right


Output:

References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalInt.html#ifPresent(java.util.function.IntConsumer)



My Personal Notes arrow_drop_up

I am a Developer I love to code and bring my ideas alive

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.