is an agile and dynamic language for the Java Virtual Machine

builds upon the strengths of Java but has additional power features inspired by languages like Python, Ruby and Smalltalk

makes modern programming features available to Java developers with almost-zero learning curve

provides the ability to statically type check and statically compile your code for robustness and performance

supports Domain-Specific Languages and other compact syntax so your code becomes easy to read and maintain

makes writing shell and build scripts easy with its powerful processing primitives, OO abilities and an Ant DSL

increases developer productivity by reducing scaffolding code when developing web, GUI, database or console applications

simplifies testing by supporting unit testing and mocking out-of-the-box

seamlessly integrates with all existing Java classes and libraries

compiles straight to Java bytecode so you can use it anywhere you can use Java