What does the Optional.empty() method return?

Java MCQ: What does the Optional.empty() method return?

Answer:

Explanation:

The Optional.empty() method returns an Optional with no value present. This method is used to create an Optional object that represents the absence of a value.

Here’s an example of using Optional.empty():

import java.util.Optional;

public class OptionalEmptyExample {
    public static void main(String[] args) {
        Optional<String> optional = Optional.empty();
        System.out.println("Is value present: " + optional.isPresent());
    }
}

In this example, Optional.empty() creates an empty Optional object. The isPresent() method is then used to check whether the Optional contains a value, which in this case it does not, so false is printed.

Optional.empty() is useful when you want to explicitly represent the absence of a value in a type-safe way, avoiding the use of null and reducing the risk of NullPointerException.

Reference links:

https://www.rameshfadatare.com/learn-java-programming/
https://www.javaguides.net/p/java-tutorial-learn-java-programming.html