Execute java methods using Python or Perl client

I have a java application as a server (installed on Tomcat / Apache) and another Java application as a client. The client’s task is to get some arguments and pass them to the server and call the appropriate method on the server to execute.

I want the client to be in other languages, such as Perl, Python or TCL. So, I need to know how to establish a connection and what is the structure of communication. I'm not looking for any codes, but want to know more about how to execute some Java codes through other languages. I am trying to do this, but basically I found a specific question / answer, not a tutorial or something like that. I wonder if you need to search for a specific expression? Do you know any textbook or website that explains such structures, considering all aspects? Thanks a lot Bye.