To get started with Kotlin, download the Android Studio 3.0 preview, open one of your existing Java files, and then choose “Convert Java File to Kotlin File” in the Code menu.

That’s important because if you want to target Android O, create an Instant App, start developing with Kotlin, or use the latest Android app performance tools, you’ll need Android Studio 3.0.

Kotlin doesn’t have its own editors or IDEs; it has plug-ins for the popular Java editors and IDEs, including IntelliJ IDEA, Android Studio, and Eclipse. Kotlin doesn’t have its own build ...