orElse vs orElseGet in Java Optional (with Examples)
orElse vs orElseGet in Java explained with examples. Learn why orElse always computes its default, when orElseGet saves work and how to avoid side effects.
Java Optional Guide: Methods, Examples and Best Practices
Java Optional guide with examples of of, ofNullable, map, flatMap, orElseThrow, isEmpty, stream and or, plus where not to use Optional.