if I set java 11 as the target of kotlin, will jav...

# announcements

[xenoterracide]

if I set java 11 as the target of kotlin, will java files also be able to use things like var (from java 10)?

[gildor]

To use Java 10 features you should set sourceCompatibility and targetCompatibility to Java plugin, not to Kotlin (for Kotlin it will just change target bytecode version)
Something like:

java {
   sourceCompatibility = JavaVersion.VERSION_11
    targetCompatibility = JavaVersion.VERSION_11
}

[xenoterracide]

ah, ok wasn’t sure how this worked when using the kotlin plugin

[xenoterracide]

so it’s just using the JavaCompile task under the hood

[gildor]

yes, sure, Kotlin doesn’t compile Java code itself

[xenoterracide]

thanks

[gildor]

also it wouldn’t be flexible enough, you may want target version of Kotlin bytecode to be Java 6, but source and target of Java to be Java 11

[xenoterracide]

right

[alex]

If you're using JDK9+, then it's more convenient to set --release flag to 8/11/etc

[xenoterracide]

hmm

[xenoterracide]

Could not determine the dependencies of task ':compileJava'.
> Could not resolve all task dependencies for configuration ':compileClasspath'.
   > Could not resolve com.potreromed.phg:phg-emr:0.1.0-SNAPSHOT.
     Required by:
         project :
      > Unable to find a matching variant of project :phg-emr:
          - Variant 'apiElements' capability com.potreromed.phg:phg-emr:0.1.0-SNAPSHOT:
              - Incompatible attribute:
                  - Required org.gradle.jvm.version '8' and found incompatible value '11'.
              - Other attributes:
                  - Found org.gradle.category 'library' but wasn't required.
                  - Required org.gradle.dependency.bundling 'external' and found compatible value 'external'.
                  - Required org.gradle.libraryelements 'classes' and found compatible value 'jar'.
                  - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
                  - Required org.jetbrains.kotlin.platform.type 'jvm' but no value provided.

[xenoterracide]

only seems to happen in my composite build, when running outside of the idea composite build things are fine

[xenoterracide]

ah, figured it out, my idea gradle setting was still pointing to jdk 8