Most web directories are PHP scripted. If your web directory is coded (J2EE or .Net) please list it here and mention the framework you are using Cheers
I have never come across a site that is coded using J2EE but you can visit http://creascripts.com/ to find a ASP coded directory
Most end users don't particularly care about the technology involved in the solution, just that the solution looks good, works well and meets their needs.