The way event driven programming works in Java is that a handler object fires an event, and a source object processes the event.


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In event-driven programming, events are triggered by a user action or system event, and the program responds accordingly.

In Java, this pattern is implemented using event handlers and event sources. The event handler is responsible for defining the actions to be taken when a specific event occurs. The event source is the object that generates the event.

When an event occurs, the source object fires or raises the event. This means that the source notifies the event handler that the event has occurred. The event handler then processes the event by executing the defined actions.

To implement event-driven programming in Java, you typically follow these steps:
1. Create an event handler class that implements the appropriate event interface or extends a relevant event adapter class. The event handler defines the required methods that need to be implemented in response to the event.
2. Create the event source object or objects that will generate the events. These objects often have methods or actions that will trigger the events.
3. Connect the event handler to the event source. This is usually done by registering the event handler with the event source, so that it will be notified when the events occur.
4. Implement the desired actions or behaviors in the event handler methods. These methods will be called automatically when the corresponding events are triggered.

Overall, event-driven programming in Java allows for a flexible and responsive user interface, as well as efficient handling of system events.