After updating to compose 1 4 5 compiler and kotlin 1 8 20 s

Question

After updating to compose 1 4 5 compiler and kotlin 1 8 20 seems like Java 11 is not enough anymore as I am getting UnsupportedClassVersionError Is this known and expected thinking face

Arkadii Ivanov · Answer

Seems related <https kotlinlang slack com archives CJLTWPH7S p1681323339179339 thread ts=1681323339 179339 amp cid=CJLTWPH7S|https kotlinlang slack com archives CJLTWPH7S p1681323339179339 thread ts=1681323339 179339 amp cid=CJLTWPH7S>

jim · Answer

Just added a note to the release notes Will reproduce it here for general awareness ```NOTE This build of Compose Compiler 1 4 5 requires your build environment to use Java 17+ Based on user feedback we will drop this requirement back to Java 11 and follow up with another release 1 4 6 to better support users who are using older Java versions ``` The release will probably go out next week

Jan · Answer

Dumb question but what are the biggest benefits to dropping support What were the main pain points

jim · Answer

We gotta keep you on your toes sweat smile rolling on the floor laughing

jim · Answer

More seriously though I don t think there were any real benefits to dropping support Our build team was just doing some routine upgrades and given that Java17 is already a couple of years old it wasn t clear anyone would notice Anyway that s why we re adding back support for Java11

vide · Answer

What would I need to do to update to Java 17 Am I missing something ```$ gradlew version JVM 17 0 6 Homebrew 17 0 6+0 ``` but still getting the same error when trying to use 1 4 5 thinking face EDIT Figured it out The project was set to 11 sweat smile

Rafael Costa · Answer

Seems also like Java 11 or I guess other lt 17 is the default on GitHub actions If so this might be even more annoying I haven t delved too much in this but I had a GitHub action that didn t specify any step to setup Java and it was working before Then I had to add a new step to setup Java version

Jan · Answer

Any concerns in regard to android device compatibility As far as I understand at the end everything gets desugared back to java 11 when building an APK so it should be fine

jim · Answer

Compose Compiler 1 4 6 with support for Java11 toolchain is released <https developer android com jetpack androidx releases compose compiler 1 4 6>