OptionalDouble orElseThrow() method in Java with examples
Last Updated :
27 Dec, 2022
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 NoSuchElementException. 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:
Java
import java.util.OptionalDouble;
public class GFG {
public static void main(String[] args)
{
OptionalDouble opDouble
= OptionalDouble.of(134.1);
System.out.println("double Value extracted using"
+ " orElseThrow() = "
+ opDouble.orElseThrow());
}
}
|
Output:
double Value extracted using orElseThrow() = 134.1
Program 2:
Java
import java.util.OptionalDouble;
public class GFG {
public static void main(String[] args)
{
OptionalDouble opDouble
= OptionalDouble.empty();
try {
Double value = opDouble.orElseThrow();
}
catch (Exception e) {
System.out.println("Exception thrown : "
+ e);
}
}
}
|
Output:
Exception thrown : java.util.NoSuchElementException: No value present
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalDouble.html#orElseThrow()
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