event handling in java using applet

PDF	Event Handling Event Handling • Event handling is fundamental to Java programming because it is used to create event driven programs eg • Applets

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What are event sources in Java?
➢ Event Sources
A source is an object that generates an event.
Sources may generate more than one type of event.
A source must register. listeners in order for the listeners to receive notifications about a specific type of event.
What is the event handling in Java?
Event handling in Java is the procedure that controls an event and performs appropriate action if it occurs.
The code or set of instructions used to implement it is known as the Event handler.
How to handle event in applet in Java?
Once the event is received , the listener process the event an then returns.
To handle mouse events, we must implement the MouseListener and the MouseMotionListener interfaces. displayed in the upper-left corner of the applet display area.
EventListener interface is provided in java.
An event listener in Java is designed to process some kind of event — it "listens" for an event, such as a user's mouse click or a key press, and then it responds accordingly.
An event listener must be connected to an event object that defines the event.

Explanation

Firstly extend the class with the applet and implement the respective listener.
Create Text-Field and Button components.
Registered the button component with respective event. i.e. ActionEvent by addActionListener().
In the end, implement the abstract method.

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