compose/README.md says JDK 11, but the build expects JDK 17

[OliverO2]

Describe the bug Trying the build as described in compose/README.md:

androidx/benchmark/gradle/Adb has been compiled by a more recent version of the Java Runtime

Affected platforms Select one of the platforms below:

• All

Versions

• Compose Multiplatform version*: latest sources at 5b1ce09

[dima-avdeev-jb]

Thanks! This instruction is useful for contributors of Compose Multiplatform. In my environment, it is also works with JDK 11. But for that, you also need to follow another steps of this README, like this:

[macOs/Linux] Android SDK downloaded via ./compose/frameworks/support/jbdeps/android-sdk/downloadAndroidSdk

[OliverO2]

Interesting. I did follow the other step and downloaded the SDK and still got the above error. Wondering what the difference might be.

I remember correctly, these are the steps I took:

Download submodules after downloading the main project:

• [x] Cloned the project via the IDE:

IntelliJ IDEA 2022.3.2 (Ultimate Edition)
Build #IU-223.8617.56, built on January 26, 2023
Runtime version: 17.0.5+1-b653.25 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.

• [x] git submodule update --init --recursive
• [x] git config --global submodule.recurse true (was already set before)

General requirements

• [x] Java 11 (should be specified in JAVA_HOME)
  • I did not specify JAVA_HOME due to the installed default:

    $ java -version
    openjdk version "11.0.18" 2023-01-17
    OpenJDK Runtime Environment (build 11.0.18+10-post-Ubuntu-0ubuntu120.04.1)
    OpenJDK 64-Bit Server VM (build 11.0.18+10-post-Ubuntu-0ubuntu120.04.1, mixed mode, sharing)

• [x] [macOs/Linux] Android SDK downloaded via ./compose/frameworks/support/jbdeps/android-sdk/downloadAndroidSdk
• [x] Open compose/frameworks/support folder ~either in Android Studio or~ in IDEA ~or in AppCode with KMM plugin~.
• [x] Specify Gradle JVM to use JDK 11 in InteliJ IDEA Preferences (Build, Execution, Deployment -> Build Tools -> Gradle)

Other steps taken

• [x] Unset ANDROID_SDK_ROOT (previously set to the a separate Android SDK at another location)
  • Still unsuccessful
• [x] Specify Gradle JVM to use JDK 17 in InteliJ IDEA Preferences (Build, Execution, Deployment -> Build Tools -> Gradle)
  • This did the trick.

[dima-avdeev-jb]

Thanks for this research! We will check it! What OS do you have?

[OliverO2]

Ubuntu 20.04.5 LTS (yes, I'm lazy with upgrading this one).

[dima-avdeev-jb]

@OliverO2 So, with JDK17 your development environment works well?

[dima-avdeev-jb]

I think soon we will update this doc to use JDK17 and newer.

[OliverO2]

So, with JDK17 your development environment works well?

Yes, so far it does. I have successfully ported compose-counting-grid to Wasm as you can see in this Slack thread. Somewhat hacky, but I was able to integrate it as another example next to compose-jb/compose/frameworks/support/compose/mpp/demo.

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.