Clojure is a dynamic programming language that targets the Java Virtual Machine. It is designed to be a general-purpose language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming. Clojure is a compiled language - it compiles directly to JVM bytecode, yet remains completely dynamic. Every feature supported by Clojure is supported at runtime. Clojure provides easy access to the Java frameworks, with optional type hints and type inference, to ensure that calls to Java can avoid reflection.
Clojure is a dialect of Lisp, and shares with Lisp the code-as-data philosophy and a powerful macro system. Clojure is predominantly a functional programming language, and features a rich set of immutable, persistent data structures. When mutable state is needed, Clojure offers a software transactional memory system and reactive Agent system that ensure clean, correct, multithreaded designs.
Spring 2.5 ships with great support for integration testing through the classes in the org.springframework.test package. These classes allow you to dependency inject your test cases off of your existing Spring configuration, either by using your production Spring configuration file or one you've defined especially for the test case. This post explains how to annotate your JUnit 4 test cases to be autowired, but there's a lot more too the new spring-test.jar and it works with JUnit 3.8 also.