When might JNDI be required?

Question

Java

Everything seems clear with the definition, but it is not clear in what cases this may be required.
How to understand that in a situation you need to use JNDI?

Answer 1

In short, usually when you have some kind of application server, you create all sorts of resources there (data-source, jms, etc) using the server itself, and not inside your application. And the application already receives a reference to the resource from JNDI by the name of the resource.

Answer 2

JNDI is an excellent functionality that can independently resolve the relationship of your application, let's say with a DBMS server, etc. Even the Apache Tomcat WEB container has this functionality.