Optional Best Practices
Apply orElse, orElseGet, orElseThrow, and avoid common Optional anti-patterns.
Optional Best Practices
Optional is a powerful tool when used correctly. This lesson covers the do's and don'ts with concrete examples from real-world codebases.
Do: Use Optional as Return Type
The primary use case for Optional is as a return type from methods that might not find/produce a value.
import java.util.Optional;
// Good: signals to caller that result might be absent
public Optional<User> findByUsername(String username) { ... }
public Optional<Config> getConfig(String key) { ... }
public Optional<String> getHeader(String name) { ... }
// These are all cases where absence is a normal outcome,
// not an exceptional conditionAll lessons in this course
- Why Optional Exists
- Creating and Inspecting Optionals
- Transforming Optionals: map and flatMap
- Optional Best Practices