Types of event classes in Java

An event is one of the most important concepts in Java. The change in the state of an object or behavior by performing actions is referred to as an Event in Java. Actions include button click, keypress, page scrolling, or cursor movement.

Some of the most used Event classes are:

	Event Class	Listener Interface	Methods	Descriptions
1.	ActionEvent	ActionListener	actionPerformed()	ActionEvent indicates that a component-defined action occurred.
2.	AdjustmentEvent	AdjustmentListener	adjustmentValueChanged()	Adjustment events occur by an adjustable object like a scrollbar.
3.	ComponentEvent	ComponentListener	componentResized(), componentMoved(), componentShown() and  componentHidden()	An event occurs when a component moved, changed its visibility or the size changed.
4.	ContainerEvent	ContainerListener	componentRemoved() and componentAdded()	The event is fired when a component is added or removed from a container.
5.	FocusEvent	FocusListener	focusLost() and  focusGained()	Focus events include focus, focusout, focusin, and blur.
6.	ItemEvent	ItemListener	itemStateChanged()	Item event occurs when an item is selected.
7.	KeyEvent	KeyListener	keyPressed(), keyReleased(), and keyTyped().	A key event occurs when the user presses a key on the keyboard.
8.	MouseEvent	MouseListener and MouseMotionListener	mouseClicked(), mousePressed(), mouseEntered(), mouseExited() and  mouseReleased() are the  mouseListener methods.  mouseDregged() and  mouseMoved() are the  MouseMotionListener()  methods.	A mouse event occurs when the user interacts with the mouse.
9.	MouseWheelEvent	MouseWheelListener	mouseWheelMoved().	MouseWheelEvent occurs when the mouse wheel rotates in a component.
10.	TextEvent	TextListener	textChanged()	TextEvent occurs when an object's text change.
11.	WindowEvent	WindowListener	windowActivated(), windowDeactivated(), windowOpened(), windowClosed(), windowClosing(), windowIconfied() and  windowDeiconified().	Window events occur when a window's status is changed.