A Java record is a Kotlin data class? Right? https://blogs.oracle.com/javamagazine/records-come-to-java

Not exactly, but they are close

From what I read from the docs,

data class

and Java records have the same goal, but differ on the implementation : - Records share a base class

java.lang.Record

-

toString

,

hashCode

... have a JVM intrinsic with

invokeDynamic

, resulting in smaller and more efficient bytecode (data classes may benefit from that in the future) - Data classes are fully generated at compile time and are platform-agnostic

Jake Wharton explains it a lot on kotlinconf -

Thank you all for your feedback

Is not a problem to kotlin at all, but a problem to lombok 🙂

If it gets added, I''m sure the maintainer of Lombok will be happy. One less feature to have to support/develop/maintain. But I've rarely had to deal with Lombok, and never chose to use it.

Lombok is made for old Java versions. Records are only preview in JDK14 and adoption rate will be minuscule for a long time still.

Another difference to Kotlin data classes is that fields of Java records are always

val

(i.e. no setters)

Java records don’t seem to have the convenient copy method that Kotlin data classes have.