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COMPUTER SOFTWARE APPLICATION - CITS

Control & Description

AWTEvent
It is the root event class for all AWT events. This class and its subclasses supercede the original java.awt.
Event class.

ActionEvent
The ActionEvent is generated when button is clicked or the item of a list is double clicked.
InputEvent
The InputEvent class is root event class for all component-level input events.
KeyEvent

On entering the character the Key event is generated.
MouseEvent
This event indicates a mouse action occurred in a component.

Introduction to event listener interfaces

The Event listener represent the interfaces responsible to handle events. Java provides us various Event listener
classes but we will discuss those which are more frequently used. Every method of an event listener method
has a single argument as an object which is subclass of EventObject class. For example, mouse event listener
methods will accept instance of MouseEvent, where MouseEvent derives from EventObject.
Event Listener interface:-
It is a marker interface which every listener interface has to extend.This class is defined in java.util package.
Class declaration:-

Following is the declaration for java.util.EventListener interface:
public interface EventListener
AWT Event Listener Interfaces:
Following is the list of commonly used event listeners.
Control & Description
1 ActionListener

This interface is used for receiving the action events.
2 ComponentListener
This interface is used for receiving the component events.
3 ItemListener

This interface is used for receiving the item events.
4 KeyListener
This interface is used for receiving the key events.
5 MouseListener
This interface is used for receiving the mouse events.

6 TextListener
This interface is used for receiving the text events.
7 WindowListener
This interface is used for receiving the window events.

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CITS : IT&ITES - Computer Software Application - Lesson 116 - 119 CITS : IT&ITES - Computer Software Application - Lesson 116 - 119