OptionalDouble orElseThrow() method in Java with examples

OptionalDouble help us to create an object which may or may not contain a Double value. The orElseThrow() method help us to get the double value. If double value is not present then this method will throw NoSuchElemenrException.

Syntax:

public Double orElseThrow()

Parameters: This method accepts nothing.



Return value: This method returns the Double value described by this OptionalDouble.

Exception: This method throws NoSuchElementException if no value is present

Below programs illustrate orElseThrow() method:
Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// OptionalDouble.orElseThrow() method
  
import java.util.OptionalDouble;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a OptionalDouble
        OptionalDouble opDouble
            = OptionalDouble.of(134.1);
  
        // get value using orElseThrow()
        System.out.println("double Value extracted using"
                           + " orElseThrow() = "
                           + opDouble.orElseThrow());
    }
}

chevron_right


Output:

double Value extracted using orElseThrow() = 134.1

Program 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// OptionalDouble.orElseThrow() method
  
import java.util.OptionalDouble;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a OptionalDouble
        OptionalDouble opDouble
            = OptionalDouble.empty();
  
        try {
  
            // try to get value from empty OptionalDouble
            Double value = opDouble.orElseThrow();
        }
        catch (Exception e) {
  
            System.out.println("Exception thrown : "
                               + e);
        }
    }
}

chevron_right


Output:

Exception thrown : java.util.NoSuchElementException: No value present

References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalDouble.html#orElseThrow()



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.