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.
Kotlin 1.7.0 introduces an alpha version of the new K2 compiler and a new approach to incremental compilation in Gradle. JetBrains has released Kotlin 1.7.0, an upgrade to the language for JVM, web, ...