OptionalLong ifPresentOrElse() method in Java with examples

The ifPresentOrElse(java.util.function.LongConsumer, java.lang.Runnable) method helps us to perform the specified LongConsumer action the value of this OptionalLong object. If a value is not present in this OptionalLong, then this method performs the given empty-based Runnable emptyAction, passed as the second parameter

Syntax:

public void ifPresentOrElse(LongConsumer action,
                            Runnable emptyAction)

Parameters: This method accepts two parameters:



  • action: which is the action to be performed on this Optional, if a value is present.
  • emptyAction: which is the empty-based action to be performed, if no value is present.

Return value: This method returns nothing.

Exception: This method throw NullPolongerException if a value is present and the given action is null, or no value is present and the given empty-based action is null.

Below programs illustrate ifPresentOrElse() method:
Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// OptionalLong.ifPresentOrElse() method
  
import java.util.OptionalLong;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a OptionalLong
        OptionalLong oplong = OptionalLong.of(12);
  
        // apply ifPresentOrElse
        oplong.ifPresentOrElse(
            (value)
                -> { System.out.println("Value is present, its: "
                                        + value); },
            ()
                -> { System.out.println("Value is empty"); });
    }
}

chevron_right


Output:

Value is present, its: 12

Program 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// OptionalLong.ifPresentOrElse method
import java.util.OptionalLong;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a OptionalLong
        OptionalLong oplong = OptionalLong.empty();
  
        // apply ifPresentOrElse
        oplong.ifPresentOrElse(
            (value)
                -> { System.out.println("Value is present, its: "
                                        + value); },
            ()
                -> { System.out.println("Value is empty"); });
    }
}

chevron_right


Output:

Value is empty

References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalLong.html#ifPresentOrElse(java.util.function.LongConsumer, java.lang.Runnable)



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.