Event-Driven Applications

Event-Driven Applications
An Introduction with Examples in Java

Prof. David Bernstein
James Madison University

Computer Science Department

bernstdh@jmu.edu

Motivation

Multi-Threaded Applications:
- It can be very difficult to ensure that the right things happen at the right time
Overcoming this Difficulty:
- Focuses on how classes should handle events rather than on how or when these events will occur

Designing Event-Driven Applications

Focus On:
- The events that can occur (e.g., mouse clicks, timing signals, key presses);
- The classes that can generate events of different kinds (often called event producers; and
- The classes that need to respond to events of different kinds (often called event handlers.
Do Not Focus On:
- The order in which events occur

Events

One Simple Implementation

javaexamples/events/Event.java