Groovy is good alternative JVM language if you just want some improvements on Java without a completely new language to learn. It addresses many of the small fr

Groovy is good alternative JVM language if you just want some improvements on Java without a completely new language to learn. It addresses many of the small frustrations I have with Java (lack of list and map literals, lack of anonymous functions) without introducing many new paradigms or complexities. I'd recommend it to anyone wanting a quick prototyping language on the JVM.