How does the Event-API of “Spigot / Bukkit” work?

Question

Iam trying to understand, how object-oriented programming in Java works. Herefor I thougth the Spigot-API would be a very nice example.

For everyone, who doesnt know spigot : Its an API for making minecraft plugins.

I reached the point, where I understood quite a few things, but now I´m stuck on "Eventlistener". There is an Event-API in Spigot for this : https://www.spigotmc.org/wiki/using-the-event-api/

This page explains how to use listeners. But how is it possible, to implement an whole Interface without all methods and not to use the @Override annotation ?

Answer 1

It's an interface to tag all listeners.

It doesn't contain any methods so there is nothing to override.