Javaslang VS Immutables

If you want to cut down on code verbosity in Java, I recommend instead looking into using Java 17 (records), and/or the Vavr library (port of some Scala standard library approaches to Java). https://github.com/vavr-io/vavr

If I managed to gain you interest you can take a look at one of the following libraries like cats, scalaz for scala and vavr for java which contain type class definitions and implementations for common types.

I'm aware not everyone likes it, but vavr has these.

https://github.com/vavr-io/vavr/releases showed Vavr 0.10.4 from July 2021 as latest release. 🤷

I would like to see a more fully-functional tool set available in Java itself. (Functors, Applicatives, Monads, Arrows, and more) Vavr is kind of doing that, but also kind of not really. Scala has all of that, and Scala is fun for sure, but it brings in a lot of baggage for interop. (Sometimes that's not a great choice, e.g. for an old legacy project)

Functional Programming is becoming more and more popular. Spring provides a couple of DSLs for the Kotlin language. For example, the Beans DSL and the Routes DSL allow for a more functional approach toward Spring configuration. On the type side, Vavr (previously Javaslang) is pretty popular in Java, while Kotlin has Arrow.

Or perhaps they could implement it like String. String has mutators but they don’t change the original value. To get the modified one, assign it to another variable. Another example is the collection framework of vavr.

This is every Lombok lover's favorite strawman argument I've run into.

I've been coding in Java professionally for ~20 years. I can count with zero hands the number of times I've been burned by a getter or setter getting changed into something surprising.

If you really need auto-generated getters/setters/builders - Immutables [1] is a library that does it using bog standard annotation processing rules that don't require hacking your build process.

[1] https://github.com/immutables/immutables

https://github.com/immutables/immutables/issues/1358 https://bugs.openjdk.java.net/browse/JDK-8281238

That's good, but I prefer this : https://github.com/immutables/immutables It has all sorts of neat stuff like lazy, defered, cached, defaults etc. Just needs updating to use records.

Not bad :) I like using Immutables (which is backed by the style of implementation referenced in the link in https://github.com/immutables/immutables/issues/450)

Annotation processors? Like Immutables? Those already exists, but the major difference is that an annotation processor cannot change the processed class, but has to create another one.

While you’re looking into this I would highly recommend checking out immutables. https://github.com/immutables/immutables It is pretty popular in the industry and very nice!