Here is a small freebie from O'Reilly that gives an overview of new features in Java 7. Here is the blurb from the publisher:
Java 7 has a number of features that will please developers. Madhusudhan Konda provides an overview of these, including strings in switch statements, multi-catch exception handling, try-with-resource statements, the new File System API, extensions of the JVM, support for dynamically-typed languages, and the fork and join framework for task parallelism.
