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Java sealed classes and exhaustive pattern matching

83 points • by hnisjafx40 • today at 2:47 PM • 49 comments • view on HN

Comments

shepherdjerred • today at 6:58 PM

I love how far Java has come. I still prefer TypeScript since I do a lot of frontend work and prefer to use the same language across the stack.

With the said, you can do exhaustive pattern matching in TypeScript! https://github.com/gvergnaud/ts-pattern

armchairhacker • today at 3:47 PM

Java also has recursive patterns and (maybe still in preview) literal patterns: `switch (x) { case A(B(true, var c)) -> f(c); }`

timshel2 • today at 4:42 PM

Scala punching the air rn

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Larrikin • today at 3:48 PM

Java continues to try and catch up to Kotlin https://kotlinlang.org/docs/sealed-classes.html

I didn't mind Java when the comparisons were to C++, Ruby, and Python. I can not find a reason to go back after Scala (which seemed to fail due to being indiscriminate) and especially Kotlin

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