Quick Answer
Optional.map() applies a function to the contained value if present, wrapping the result in Optional. If empty, returns empty. Optional.flatMap() applies a function that itself returns Optional and doesn't double-wrap - used to chain Optional-returning methods. map is for non-Optional-returning functions, flatMap for Optional-returning functions (avoids Optional>).
Answer
map transforms the wrapped value and wraps it again. flatMap avoids nested Optionals by flattening results. Useful with functions returning Optional.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
