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Comment by throwaway2037 | Hacker News Reader

throwaway2037

    > Java has evolved to contain much of “ML the good parts”

Can you give some examples?

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Not OP. IMO the recent Java changes, including pattern matching (especially when using along with sealed interface), virtual threads (and structured concurrency on the way), string templates, are all very solid additions to the language.

Using these new features one can write very expressive modern code while still being interoperable with the Java 8 dependency someone at their company wrote 20 years ago.

fyi: string templates were just a preview and removed in Java 23

For Java systems that I work on for my own account there is a lot of stuffing things like SQL queries into resource files so that I don't have to mess around with quotes and such.

Like a lot of other languages, Java has gotten a big dose of

https://en.wikipedia.org/wiki/Hindley%E2%80%93Milner_type_sy...

To defy it's reputation for verbosity, Java's lambda syntax is both terse and highly flexible. Sum and product types are possible with records and sealed classes. Pattern matching.

I even found a way to make ad-hoc union types of element types from other packages that does exhaustive switch/case checking. I quickly wrote down a PoC so I wouldn't forget[0]. It needs wrapper types and sealed interfaces in the consuming app/package but is manageable and turned out better than other attempts I'd made.

[0] https://github.com/karmakaze/AdHocUnion

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