Java coding hacks developers should know 🧵 1) Use Map.ofEntries() for creating multi-pair immutable maps Why: Shorter, immutable, safer and avoids accidental mutation.
2) Use Optional. map().orElse() instead of manual null handling Why: Eliminates null checks, reads better, and chains smoothly with other logic.
3) Use Enum.valueOf() + name() for safe enum conversion Why: Cleaner, and lets you easily serialize/deserialize enums in APIs, DB, or files.
4) Use Comparator.comparing().thenComparing() instead of custom logic Why: Clear, readable, no error-prone conditional comparisons
5) Use Optional.ifPresentOrElse() instead of if-else with isPresent() Why: Cleaner and more expressive - no more manual get() calls or if-else clutter.
This is not the goal of Optional, which is a data wrapper not a control flow operator. When implementing an algorithm it is better to write a null check with a simple if than using an Optional.
"Use Optional. map().orElse() instead of manual null handling" Nah, that is actually not recommended. Only use Optional if you receive an Optional.
Not sure you should do this just because it compiles/works. I like your other examples though!
Sorry, it's a bad pattern. You should use it only if you already got an optional User. Otherwise use ? operator as it is cleaner, concise with no overhead. Even if you need chaining - there's a better way by using instanceof with patterns:
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