event driven programming in java geeksforgeeks

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event-driven programming is a paradigm in which the flow of the program is determined by events—such as user actions (mouse clicks, keyboard input) or sensor outputs. in java, event-driven programming is widely used in graphical user interface (gui) applications. the java swing library is one of the primary tools for building guis in java.

overview of event-driven programming in java

1. **events**: an event is an action or occurrence recognized by the program. examples include mouse clicks, key presses, or window resizing.

2. **event sources**: objects that generate events are known as event sources. for instance, buttons, text fields, and windows.

3. **event listeners**: these are interfaces that define methods to handle specific types of events. when an event occurs, the event source notifies its registered listeners.

4. **event handling**: the process of responding to events. this typically involves implementing listener interfaces and registering them with the event source.

components of event-driven programming in java

1. **event source**: component that generates the event (e.g., a button).
2. **event listener**: an interface (e.g., `actionlistener`) that defines the method to handle events.
3. **event object**: contains information about the event (e.g., which button was pressed).

example: simple swing application

here's a simple example demonstrating event-driven programming using java swing. this application creates a window with a button that, when clicked, displays a message.
explanation of the code

1. **creating a jframe**: the main window of the application is created using `jframe`.

2. **creating a jbutton**: a button is created using `jbutton` and given a label.

3. **adding actionlistener**: the `addactionlistener` method is called on the button to register an event listener. inside this listener, we override the `actionperformed` method to specify the action to take when the button is clicked.

4. **displaying a message**: when the ...

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