Re: I am in the process of doing a Proof Of Concept / Evaluating products that can help us build a Java Application to Convert a PDF document to a Searchable PDF. I wanted to check is there any simple JAVA API from Adobe to achive this ? Any direction i

There is no standalone java solution. You need to install LiveCycle server.

As you have mentioned "lces_server_11_0_0_weblogic_all_win.zip" it means these are the LC ES4(11.0.0) installation bits for Weblogic application server which is supposed to install on supported windows platform.