The document presents an overview of the event delegation model in Java, highlighting its significance in GUI applications and the components involved, including event sources, listeners, and event objects. It provides a step-by-step guide on implementing event delegation with examples, such as handling button clicks and creating custom events. Best practices for event handling are also discussed, emphasizing simplicity and performance.

1. Implementing the Event
Delegation Model in Java
Understanding Event Handling in Java
Presented by: Sujoy

2. Introduction to Event Delegation
Model
• • Explanation of the Event Delegation Model
• • Importance of the model in Java GUI
applications

3. How Event Delegation Works
• • Event Source, Event Object, and Event
Listener
• • Overview of the event flow from the source
to the listener

4. Key Components of the Event
Delegation Model
• • Event Source: Object that generates the
event (e.g., button, text field)
• • Event Listener: Interface that defines the
event handler method
• • Event Object: Contains information about
the event

5. Benefits of Using Event Delegation
• • Separation of concerns
• • Reusability of code
• • Better performance by reducing memory
footprint

6. Implementing Event Delegation in
Java
• • Code Example: Step-by-step guide to
implementing an ActionListener
• • Walkthrough of how to handle events with
listeners

7. Example Application: Button Click
• • Simple Java program to demonstrate button
click handling using ActionListener
• • Code snippets with explanations

8. Custom Events and Listeners
• • Creating custom events and listeners
• • When and why to create custom events

9. Best Practices in Event Handling
• • Keeping event handling methods simple
• • Avoiding blocking operations in listeners
• • Using anonymous inner classes and lambda
expressions for concise code

10. Conclusion
• • Summary of the Event Delegation Model
• • Benefits and use cases in Java applications

11. Q&A
• Any questions?