https://trishagee.github.io/presentation/java_9_are_we_there_yet/

1. —
Trisha Gee (@trisha_gee)
Developer & Technical Advocate, JetBrains
Java 9 in Anticipation:
Features and Tooling

2. Safe Harbour
Blah blah, don’t rely on anything I’m saying, I’m
not committing to anything, estimates are hard,
things change, this is just what’s in our head
right now, no promises. OK? kthxbai

3. Java 9

4. Jigsaw, yay!

5. But it might break everything…

6. …and I don’t need it anyway.

7. So, thanks but no thanks.
I’ll wait for Value Types.

8. Java 9 is so much more than Jigsaw

9. 274: Enhanced Method Handles
275: Modular Java Application Packaging
276: Dynamic Linking of Language-Defined Object Models
277: Enhanced Deprecation
278: Additional Tests for Humongous Objects in G1
279: Improve Test-Failure Troubleshooting
280: Indify String Concatenation
281: HotSpot C++ Unit-Test Framework
282: jlink: The Java Linker
283: Enable GTK 3 on Linux
284: New HotSpot Build System
285: Spin-Wait Hints
287: SHA-3 Hash Algorithms
288: Disable SHA-1 Certificates
289: Deprecate the Applet API
290: Filter Incoming Serialization Data
292: Implement Selected ECMAScript 6 Features in Nashorn
294: Linux/s390x Port
295: Ahead-of-Time Compilation
297: Unified arm32/arm64 Port
298: Remove Demos and Samples

10. Free Lunch!
• Better Use of Memory
• Better Performance of:
• Locking
• Secure Apps
• Graphics
• Better Use of Hardware
• Better Documentation
• Prettier Graphics (Windows and Linux)
• Faster Compilation

11. Compiling with Java 9

13. https://wiki.openjdk.java.net/display/Adop
tion/JDK+9+Outreach

14. Your code might break!
Try it out now to find out sooner, not later

15. • 214: Remove Deprecated GC Combinations
• 231: Remove Launch-Time JRE Version Selection
• 240: Remove the JVM TI hprof Agent
• 241: Remove the jhat Tool
• 260: Encapsulate Most Internal APIs
• 289: Deprecate the Applet API
• 298: Remove Demos and Samples
Going Away

16. • 158: Unified JVM Logging
• 223: New Version-String Scheme
• 245: Validate JVM Command-Line Flag Arguments
• 248: Make G1 the Default Garbage Collector
• 271: Unified GC Logging
Possible Unexpected Behaviour

17. Jigsaw

18. • Generation of module-info.java
• Syntax support for module-info.java
• Code completion in module-info.java
• Compilation of multi-module projects
• Quick fixes to add requires statements
IntelliJ IDEA 2017.1

19. • Automatic generation of module-info.java
• IntelliJ IDEA module structure recognised on
import
• JLink artifacts
IntelliJ IDEA 2017.?

20. We’d Love Your Help
https://youtrack.jetbrains.com/issue/IDEA-
154240

21. Easy to Use Features

22. New Methods on the Streams API

23. 269: Convenience Factory Methods for
Collections

24. 213: Milling Project Coin
Private Methods on Interfaces

25. 277: Updated Deprecation

26. 102: Process API Updates

27. 266: More Concurrency Updates

28. JShell (repl)

29. https://java.net/downloads/adoptopenjdk/
REPL_Tutorial.pdf

30. We’d Love Your Help
https://youtrack.jetbrains.com/issue/IDEA-
161611

31. Interesting Tidbits

32. 263: HiDPI graphics on Windows

33. 224: HTML5 Javadoc

34. 225: Javadoc search

35. 248: Default Garbage Collector is now
G1

36. In Summary

37. Java 9 is more than Jigsaw

38. There’s quite a lot to gain

39. Better to find the pain sooner than later

40. http://bit.ly/j9IntelliJ
@trisha_gee