Java: How to invoke code running on a server from a browser?

Question

Is there somehow that I can invoke Java running on a server from a web browser? I would like:

1. User navigates to URL in a browser
2. User fills in input box

Answer 1

Yes, this is possible (and is extremely common). Two of the most common ways are Java Servlets (where responses are generated purely via Java code) and Java Server Pages (where server logic is intermingled within HTML, similar to ASP or PHP).