The Java version of the reference implementation is not:

The UI reference implementation is built using a significantly different architecture than that you would use for a production-ready implementation. It does not use Java beans or classes, it has a heavy amount of in-line Java, and a relatively small amount of HTML. We chose this architecture in an effort to help you better visualize the ENEQueryResults object and its nested member objects. By merging in the Java code normally reserved for classes and using a small amount of HTML in each module, we hoped to create a streamlined, easier-to-read example of how the ENEQueryResults object is manipulated.