Unable to compile under openjdk 21

[YesThatGy]

Repeated failure compiling on AndroidStudio 2024.2.1 (Lady Bug) with Java 21, on Fedora Core 40 or OSX Sequoia. Works fine with java 17 and AndroidStudio 2024.1.1.

Here's the complete output I get when I run gradlew build:

./gradlew build

Configure project :app
You are applying Flutter's main Gradle plugin imperatively using the apply script method, which is deprecated and will be removed in a future release. Migrate to applying Gradle plugins with the declarative plugins block: https://flutter.dev/to/flutter-gradle-plugin-apply

Warning: SDK processing. This version only understands SDK XML versions up to 3 but an SDK XML file of version 4 was encountered. This can happen if you use versions of Android Studio and the command-line tools that were released at different times.
WARNING:We recommend using a newer Android Gradle plugin to use compileSdk = 34

This Android Gradle plugin (7.4.2) was tested up to compileSdk = 33

This warning can be suppressed by adding
android.suppressUnsupportedCompileSdk=34
to this project's gradle.properties

The build will continue, but you are strongly encouraged to update your project to
use a newer Android Gradle Plugin that has been tested with compileSdk = 34

Task :flutter_contacts:compileDebugJavaWithJavac FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':flutter_contacts:compileDebugJavaWithJavac'.

Could not resolve all files for configuration ':flutter_contacts:androidJdkImage'.
Failed to transform core-for-system-modules.jar to match attributes {artifactType=_internal_android_jdk_image, org.gradle.libraryelements=jar, org.gradle.usage=java-runtime}.
> Execution failed for JdkImageTransform: /home/as/Android/Sdk/platforms/android-34/core-for-system-modules.jar.
> Error while executing process /usr/lib/jvm/java-21-openjdk-21.0.4.0.7-2.fc40.x86_64/bin/jlink with arguments {--module-path /home/as/.gradle/caches/8.9/transforms/c10b202ceb5416599890c387b9da5235-94742421-91e7-4f8f-ab84-e78dc738b66c/transformed/output/temp/jmod --add-modules java.base --output /home/as/.gradle/caches/8.9/transforms/c10b202ceb5416599890c387b9da5235-94742421-91e7-4f8f-ab84-e78dc738b66c/transformed/output/jdkImage --disable-plugin system-modules}

• Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org.

Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/8.9/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.

BUILD FAILED in 19s
139 actionable tasks: 6 executed, 133 up-to-date
as@tesla:~/development/shar2/android$

[anilthapa1939]

Same issue here

[evanrich]

if you take a look at the PR where they updated it for jdk 17, you could probably fork this and update to jdk21 yourself, likely just requires changing a few lines from something like JAVA_17 to JAVA_21...etc (paraphrasing here)

PR's are probably welcome as well