Java backend how does it work?

Question

Java

How and on what is backend development done in Java? To be honest, I don’t understand a little, to be more precise, I don’t understand at all, does the java backend work with the frontendo through the API? Where can you read about it?

Answer 1

Eclipse, Netbeans, etc., runs on application servers - Glassfish, Tomcat, etc.
You can read a lot and for a long time, narrowing the backend-backend area is different.
Play around with the standard Netbeans examples, I started with them.

Answer 2

java backend is a servlet - that is, java applications that perform various actions on API requests
. Such servlets are launched through an application server, such as tomcat.
Java backend development is the same as any java application

Answer 3

In short, Oracle and Sun absorbed by it have written a bunch of standards, such as javax.ws, javax.servlet, which roughly describe which methods to call in your application if it comes, let's say HTTP GET to the localhost/loli address. These standards are implemented by different dudes, who call the fruit of their creations Application Servers (example -> Glassfish, Jetty, Tomcat, Wildfly and others) And in the end you just implement the interfaces of these standards in your project, collect the code in a .war archive and upload it to a pre-installed server (installation is trivial - download and unpack the archive + run a couple of console commands) and that's it, you have a ready and working backend