Convert existing Java files to Kotlin. You can run any Java file through a Kotlin converter, by Control-clicking the file and selecting ‘Code > Convert Java File to Kotlin File. ...

Java has been very active lately in improving its concurrency model, and some of the improvements are inspired by Kotlin’s coroutines. Coroutines give you a different kind of access to threading.

Kotlin is a modern alternative to Java that supports functional programming in the JVM. Here's a first look at programming with Kotlin using some of the concepts and syntax you already know from Java.