JDK 19?

[emartynov]

I was at Droidcon UK, and there was mention that an upgrade to JDK 19 makes a noticeable build improvement.
Do you have any plans for JDK 19?

I'm also kind of person who usually uses the latest JDK possible - Do you have thoughts about pointing the latest image to the latest JDK?

[G00fY2]

My opinion: Latest Android Studio is shipping JDK 17 too. Also people usually tend to use LTS JDK versions on Android. This would be JDK 21 which will be supported with AGP 8.3.0-alpha03 and newer: https://issuetracker.google.com/issues/294137077

This also requires Gradle 8.5+ which is currently RC.

JDK 19 sounds a bit random to me. I would expect a new JDK flavor with Java 21 LTS as soon as AGP 8.3 and Gradle 8.5 went stable.

@emartynov Were you able to see noticeable faster builds locally?

[emartynov]

@G00fY2 I don't have any proper infrastructure in my build to measure speed improvement for the build times. However, Hinge dev team has it.

Slack team is on JDK 20.
Square team is on JDK 20 also.

JDK 19 is not random for me.

And, I don't write any Java code the LTS for me is not important and I believe Gradle, AGP and KGP just catch up as soon as possible.

However, let's wait if the community/users of these docker images would ask for such a change as well.

I still would appreciate having an experimental image with everything latest in it.

[G00fY2]

JDK 19 is not random for me.

I meant random in that sense that is neither the latest available version (JDK 21), nor the latest version that can be used to build with current stable AGP 8.1 (JDK 20).

And, I don't write any Java code the LTS for me is not important and I believe Gradle, AGP and KGP just catch up as soon as possible.

I know that you can use newer JDK versions.
But at least Google jumped in their docs and their embedded JDK by the LTS versions:

• pre Android Studio 4.2 JDK 8
• Android Studio 4.2+ JDK 11
• Android Studio Flamingo+ JDK 17

PS: Generally I like the idea of experimental images. But then it could be confusing what "latest" should point to. The lastest default JDK or the latest "experimental" one?

[G00fY2]

Btw AGP 8.2.1 was released wich added a fix to work with JDK 21 LTS.

[alvr]

JDK21 support is added in v2024.01.05. I skipped JDK19 because is EOL.