Hello Rory,
Just in time ! We announced the JDK9 full compatibility less than 2 days
ago:
https://josm.openstreetmap.de/ticket/11924

The compatibility effort was significant, but shared with the whole Java
ecosystem (as we created bug reports to Ant, Groovy, EqualsVerifier,
Geotools, FindBugs/SpotBugs, ErrorProne, etc.).

Aside Jigsaw, the three JDK9 changes that impacted us most were:
1) The Math improvements to Math.cos in b105 (JDK-8143353, see
https://josm.openstreetmap.de/ticket/11889 +
https://josm.openstreetmap.de/ticket/13387). It took us a long time to spot
why
our floating point calculations changed in JDK9. But we noticed a huge
performance gain, and more accurate results too. This is a huge
improvement, thanks!
2) The deprecation of _MASK constants in favor of _DOWN_MASK constants
(JDK-8143077). It was not easy to switch because ActionEvent does not
provide extended modifiers (there's no getModifiersEx() method in this
class. I think it should have been added in 9, could you please consider it
in 10 ?).
3) The impossibility to disable the "proprietary API warning" in 9 (we
disabled it with non-supported option -XDignore.symbol.file in 8). Until we
switch our codebase to a version of Java providing the new certificate
creation API (JDK-8058778), we must keep our current implementation based
on sun.x509 packages. Currently the best I can do is tell our Jenkins
instance to filter this warning.

Congrats for this major release of Java,
Best regards,
Vincent



2017-08-08 11:30 GMT+02:00 Rory O'Donnell <rory.odonn...@oracle.com>:

>
> Hi Vincent,
>
> Thank you very much for all your testing of JDK 9 during its development!
> Such contributions have significantly helped shape and improve JDK 9.
>
> Now that we have reached the JDK 9 Final Release Candidate phase [1] , I
> would like to ask if your project can be considered to be 'ready for JDK
> 9', or if there are any remaining show stopper issues which you've
> encountered when testing with the JDK 9 release candidate.
>
> JDK 9  b181 is available at http://jdk.java.net/9/
>
> If you have a public web page, mailing list post, or even a tweet
> announcing you project's readiness for JDK 9, I'd love to add the URL to
> the upcoming JDK 9 readiness page on the Quality Outreach wiki.
>
>
> Looking forward to hearing from you,
> Rory
>
> [1] http://openjdk.java.net/projects/jdk9/
>
> --
> Rgds,Rory O'Donnell
> Quality Engineering Manager
> Oracle EMEA , Dublin, Ireland
>
>

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