we have only openjdk and its 8, if devs want to migrate to 9v need to download it manually
nope, its not opensource
We cannot legally ship any version of the Oracle JDK. Their license expressly prohibits redistribution. I plan on working on Java 9 support in the coming months, but that will /not/ replace the openjdk-8 package and we do not plan on retiring OpenJDK 8 until it is no longer supported.
You are welcome to follow the instructions for installing the Oracle JDK as described here:
As this more closely aligns with a request for OpenJDK 9, I will be merging it into the related task.