JEP 441, Pattern Matching for the switch, is completed in JDK 21, following four previews in JDKs 17-20 (JEPs 406, 420, 427, 433). It finalizes the feature, addressing feedback from previews, and ...

When building a class that needs to be Serializable, using enum constituent pieces can be treated just the same as using Strings and primitives and the reference types corresponding to primitives.