I am trying to upgrade project from java 17 to jav...

# gradle

[mudasar187]

I am trying to upgrade project from java 17 to java 21. Gradle version is 8.4. I have done the same on another project fra 17 to 21 and gradle version was also 8.4. But in this project I got this error:

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':compileKotlin'.
> Unknown Kotlin JVM target: 21

kotlin {
    jvmToolchain {
        languageVersion.set(JavaLanguageVersion.of(21))
    }
}

Anyone know how I can solve this issues?

[tapchicoma]

Please make sure you are using Kotlin Gradle plugin 1.9.20. Otherwise you need to explicetly specify jvm target with lower version

[Vampire]

Which Kotlin version?

[Vampire]

The first to support 21 is 1.9.20

[mudasar187]

kotlin("jvm") version "1.9.10"

[mudasar187]

ah I see 🙂

[mudasar187]

I did not see that tiny change hehe 🙂 Thank you!