Version 1.2 of the statically typed Kotlin language, a version of Java endorsed by Google for Android app development, offers an experimental feature enabling reuse of code across platforms, as well as compatibility with the Java 9 module system.
Where to get Kotlin 1.2
Kotlin 1.2 is bundled with JetBrains’ IntelliJ Idea 2017.3 IDE, which will be released by December 1. Users of the Android Studio IDE or an older version of IntelliJ can update to the new version via Tools > Kotlin > Configure Kotlin Plugin Updates.
The new features in Kotlin 1.2