# build.gradle.kts asks for a Java 25 toolchain (lanes/upgrade/build.gradle.kts). Two questions: which JDK compiles, and which JDK runs Gradle itself?

$ gradle run      (Gradle 8.14.3 running on JDK 21, toolchain finds JDK 25)
    running on Java 25

$ gradle run      (Gradle 8.14.3 running on JDK 25)
    FAILURE: Build failed with an exception.
    * What went wrong:
    25.0.4.1

$ gradle run      (Gradle 9.1.0 running on JDK 25)
    running on Java 25