A Look at the Main JVM Languages Today
, February 14, 2012 The JVM hosts an increasingly wide array of languages. Here we compare the prominent ones, mourn those that have come and gone, and celebrate newborn languages clamoring for attention.
Kotlin
Kotlin is the most recent addition to the JVM family. It takes some of the best elements of Grooy and Scala and adds a little pixie dust of its own. It's designed to compile as fast as Java and run at native Java binary speeds, making it one of the only JVM languages to address both compilation and execution speed from the first release. Dr. Dobb's has assembled a page of Kotlin resources (including a detailed introduction).

