This article discusses Java Optional and provides answers to commonly asked interview questions related to it. Optional is a container object that may or may not contain a non-null value. It was introduced to provide a clear and explicit way to handle the absence of a value and avoid null references. Several ways to create an
Table of contents
1. What is Java Optional ?2. Why was Optional introduced?3. How do you create an Optional object?4. What is the purpose of the isPresent() method in Optional ?5. How do you retrieve the value inside an Optional ?6. What are the differences between orElse() and orElseGet() ?7. How can you transform the value inside an Optional ?8. How do you handle situations where you have a function that returns an Optional , and you want to apply it to a value inside another Optional ?9. How can you filter an Optional based on a condition?10. Can Optional be used with Java Streams?11. When would you use Optional as a return type in a method?12. Is it recommended to use Optional for the arguments or fields of a class?1 Comment
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