What is the highest-level event class of the event-delegation model

The java.util.EventObject class is the highest-level class in the event-delegation class hierarchy.

In the Java event-delegation model, the highest-level event class is java.util.EventObject. This class is the root class for all event classes in the Java AWT (Abstract Window Toolkit) and Swing libraries.

Events in Java are based on the observer design pattern, where an event source generates events and listeners respond to those events. java.util.EventObject provides a common base class for all events, and specific event classes extend it to represent different types of events.

For example, in the context of the Swing library, you might encounter event classes like ActionEvent, MouseEvent, or KeyEvent, all of which are subclasses of EventObject.