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

My school has an apache server that we are required to use. I was not allowed to install tomcat. I ended up invoking my server side Java using PHP. Not the most beautiful solution but it works.