A list of major Java and JVM features since JDK 17 to 22,
New language features
JEP-409: Sealed Classes (17)
JEP-440: Record patterns (21)
JEP-441: Pattern matching for switch (21)
JEP 456: Unnamed Variables & Patterns (22)
API changes
JEP-306: Restore Always-Strict Floating-Point Semantics(17)
JEP-382: New macOS Rendering Pipeline(17)
JEP-400: UTF-8 by Default (18)
JDK-8301226 – Clamp method for java.lang.(Strict)Math (21)
JEP-439: Generational ZGC
JEP-444: Virtual threads (21)
JEP-454: Foreign Function & Memory(FFM) API (22)
Security
JEP-452: Key Encapsulation Mechanism API (21)
JDK-8275252: keystore file
Features
JEP-408: Simple web server (18)
JEP-423: Region pinning for G1 (22)
JEP-458: multi-file source-code programs (22)
JEP-423: Region pinning for G1 (22)
JEP-458: multi-file source-code programs (22)
Documentation
JEP-413: Javadoc code snippets (18)
Deprecations
Lookahead
Scoped values + Structured concurrency
Module import declarations