java-8
3 articles
Java 8 Stream API Interview Questions, With the Output to Prove It
Java 8 stream interview questions answered with output from JDK 8, 21 and 25, including a sorted() that did no work and a parallel reduce wrong every time.
JavaJava Optional: The Methods Worth Knowing, and the One That Fools Everyone
Optional's useful methods with real output — and a measurement showing orElse runs its fallback even when the value is present, while orElseGet does not.
JavaJava Stream API Examples, and Four Ways They Surprise You
Complete stream examples with real output — grouping, flattening, collecting to a map — plus four behaviours that cause bugs not looking like stream bugs.
Java