Java 22 - Better Language, Better APIs, Better Runtime
summary
Java 22 finalizes the unnamed patterns (JEP 456) so switch branches can combine cases using the underscore instead of a default, forcing compile-time exhaustiveness; it ships the foreign‑function & memory API (Arena, MemorySegment, VarHandle, Jextract + MethodHandle-based calls) as final so native calls and off-heap buffers are safer and controllable; and it enables multi‑source‑file launch and a smaller main so multiple .java files run with java (no javac). String templates get pulled back for redesign.
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chapters (8)
- 0:00Introduction and Java 22 overview
- 2:54Why upgrade to newer Java versions
- 8:08Unnamed patterns in Java 22
- 16:39Foreign Function & Memory API
- 26:14Multi-file program launching
- 35:21Q&A session
- 41:34Stream gatherers deep dive
- 48:54Closing and resources
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