This tutorial is an introduction to socket programming in Java, starting with a simple client ... server code so far together into a slightly more robust example that uses threads to handle ...

The architecture builds on the Java EE component architecture to provide a client and server ... multiple web services that implement any combination of the two web services programming models.

For instance, a client program looking for TCP ports 20 or 21 needs File Transfer Protocol services. Like an electrical socket and plug, the server and client programs connect and data begins to ...