Kotlin offers big advantages over Java for JVM and Android development, and plays nicely with Java in the same projects.

Since Kotlin is dependent on Java, it means both languages will continue to be supported. Google will now contribute to the further growth of Kotlin and build new tools directly into Android ...

Kotlin is a super new programming language built by JetBrains, which also coincidentally develops the JetBrains IDE that Android Studio — Google’s official developer tool — is based on.