Component methods called by the container to notify the component of important events in its life cycle.

In advanced Java programming, callback methods refer to methods that are passed as arguments to other methods. These methods are then invoked or called when a certain event or condition occurs. The idea is to provide a mechanism for customizing the behavior of a function or class without modifying its code directly.

Here’s a simple explanation:

Callback Interface/Method: You define an interface or a method that represents the callback. This interface or method typically contains the code that needs to be executed when the event occurs.
Callback Function/Method: You pass an instance of the callback interface or method as a parameter to another function or method.
Event Occurrence: When a specific event occurs, the function or method that accepted the callback gets triggered and calls the provided callback method, allowing custom code to be executed.

This pattern is commonly used in various advanced Java frameworks, such as event handling in graphical user interfaces (GUIs), asynchronous programming, and more. It promotes modularity and extensibility by allowing users to inject their own behavior into existing code.