How does a web application communicate with a java server?

Question

Java

Guys, please throw off the manuals, or books or a project on gitgub, where it is considered how to write a server in java with api on the backend, and then write how to write applications to communicate with all this (web application, iOS, Android).
You have to look and understand how it's done.

Answer 1

https://ru.wikipedia.org/wiki/REST
https://jersey.java.net/ and examples: https://github.com/rkazarin/sample-jersey-webapp e.g.
stackoverflow.com/questions/8267928/ android-rest-c...