As a part of the AFF4 work I have been involved in, I recently created a set of java bindings for libewf. If you want read access to the block content or metadataof EnCase compatible forensic images from the java programming language then this is for you.
They are currently tested on the windows platform (x86). UNIX and x64 support should be trivial.
They are now included in the libewf repository as libewf-java.
Thanks to Joachim Metz for libewf and David Collett for his python bindings (on which I based my code).