Lesson 8 of 914 minModule progress 0%

Module 9: Advanced Core Features

Optional Usage Patterns

Model absence safely with Optional while avoiding anti-patterns.

Return Optional from methods rather than accepting it as a parameter.

Chain transformations with map, flatMap, or provide defaults with orElseGet.

Avoid using Optional for fields in DTOs; prefer plain nullable references serialized via JSON frameworks.

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Lesson check

Which method lazily supplies a default Optional value?

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