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The Delegation Event Model in Java is the standard mechanism for handling events in GUI-based applications. Introduced in Java 1.1, it replaced the older inheritance-based model, offering a clean separation between event source and event handling logic. This model is widely used in AWT and Swing.
In this model, an event source generates events when its state changes, and event listeners (objects implementing specific listener interfaces) handle those events. The source delegates the task of processing the event to the registered listener(s).
Core Components:
Event – An object representing a change in the state of a source (e.g., ActionEvent, MouseEvent).
Event Source – The object that generates the event (e.g., Button, TextField).
Event Listener – An object that implements a listener interface to handle the event (e.g., ActionListener, MouseListener).
Event Flow:
Event Handling in Java - GeeksforGeeks
Feb 27, 2025 · Event handling is a mechanism that allows programs to control events and define what should happen when an event occurs. Java uses the Delegation Event Model to handle events.
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