9 Lifes of JAVA 9

on YouTube ↗47m

" summary

JDK 9 modularizes the JDK and the classpath with Project Jigsaw, adds jshell REPL and jlink to build trimmed runtime images (example builds shrink ~800 MB JDK layouts to ~30 MB Docker images), makes G1 default GC, switches string concatenation to invokedynamic, and adds the Flow reactive-streams API plus multi-release jars and UTF-8 property files. 91 JDK repositories and tooling changes (jdeps, jlink, jmod, new version string, encapsulated internal APIs, PKCS#12 default, SHA‑1 deprecation) deliver measurable size, startup and API-surface changes rather than only syntax sugar.

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" chapters (40)

1. 0:00Introduction to Java history
2. 2:15Java in the enterprise era
3. 3:44Java Community Process and Tiger
4. 5:50Oracle's release process and JVM languages
5. 6:53Java as the kingdom of nouns
6. 7:17JDK 8 to JDK 9 timeline
7. 8:00JShell and REPL in Java 9
8. 10:05Project Jigsaw and modularity
9. 12:42Modularity benefits and downsizing
10. 13:25Technical debt and Java modules
11. 14:13Refactoring code to JDK modules
12. 15:16Jigsaw's modularization journey
13. 17:46Jigsaw tools and module info
14. 18:50G1 garbage collector in Java 9
15. 22:47JavaDocs and Unicode updates
16. 24:13Reactive Streams in Java 9
17. 25:34Deprecated and removed features
18. 26:40Security enhancements in Java 9
19. 28:06Encapsulated internal APIs
20. 28:48Convenience factory methods
21. 29:31JVM logging and compiler control
22. 30:56Enhanced method handles
23. 31:40G1 improvements and tests
24. 32:22Desktop features and string concatenation
25. 33:07New version string format
26. 34:31Multi-release JAR files
27. 35:12Diagnostic commands and JVM arguments
28. 36:17Variable handles and memory integrity
29. 36:58Import statements and warnings
30. 37:19HotSpot C++ unit tests
31. 37:42Jigsaw summary and tools
32. 38:45Process API and Flow API
33. 39:28Java for cloud and modularity
34. 40:09Future projects like heap sharing
35. 41:32Java release cycle changes
36. 42:36Java's evolution and future
37. 44:23JDK 9 changes recap
38. 45:10Java Enterprise and MicroProfile
39. 46:14Oracle's focus and Java's future
40. 46:35Q&A

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