OptionalLong orElseThrow() method in Java with examples
Last Updated :
27 Dec, 2022
OptionalLong help us to create an object which may or may not contain a Long value. The orElseThrow() method help us to get the value and if value is not present then this method will throw NoSuchElementException. Syntax:
public Long orElseThrow()
Parameters: This method accepts nothing. Return value: This method returns the Long value described by this OptionalLong. Exception: This method throws NoSuchElementException if no value is present Below programs illustrate orElseThrow() method: Program 1:
Java
import java.util.OptionalLong;
public class GFG {
public static void main(String[] args)
{
OptionalLong opLong = OptionalLong.of(45213246);
System.out.println("Value extracted using"
+ " orElseThrow() = "
+ opLong.orElseThrow());
}
}
|
Output:
Value extracted using orElseThrow() = 45213246
Program 2:
Java
import java.util.OptionalLong;
public class GFG {
public static void main(String[] args)
{
OptionalLong opLong = OptionalLong.empty();
try {
long value = opLong.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/OptionalLong.html#orElseThrow()
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