Module java.desktop

Package java.awt.event

Class ComponentAdapter

java.lang.Object

java.awt.event.ComponentAdapter

All Implemented Interfaces:

ComponentListener, EventListener

Direct Known Subclasses:

BasicSliderUI.ComponentHandler, BasicTreeUI.ComponentHandler, JViewport.ViewListener

public abstract class ComponentAdapter
extends Object
implements ComponentListener

An abstract adapter class for receiving component events. The methods in this class are empty. This class exists as convenience for creating listener objects.

Extend this class to create a ComponentEvent listener and override the methods for the events of interest. (If you implement the ComponentListener interface, you have to define all of the methods in it. This abstract class defines null methods for them all, so you can only have to define methods for events you care about.)

Create a listener object using your class and then register it with a component using the component's addComponentListener method. When the component's size, location, or visibility changes, the relevant method in the listener object is invoked, and the ComponentEvent is passed to it.

Since:

1.1

See Also:

• ComponentEvent
• ComponentListener
• Tutorial: Writing a Component Listener

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ComponentAdapter()	Constructs a ComponentAdapter.

Method Summary

Modifier and Type	Method	Description
void	componentHidden(ComponentEvent e)	Invoked when the component has been made invisible.
void	componentMoved(ComponentEvent e)	Invoked when the component's position changes.
void	componentResized(ComponentEvent e)	Invoked when the component's size changes.
void	componentShown(ComponentEvent e)	Invoked when the component has been made visible.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ComponentAdapter

protected ComponentAdapter()

Constructs a ComponentAdapter.

Method Details

componentResized

public void componentResized(ComponentEvent e)

Invoked when the component's size changes.

Specified by:

componentResized in interface ComponentListener

Parameters:

e - the event to be processed

componentMoved

public void componentMoved(ComponentEvent e)

Invoked when the component's position changes.

Specified by:

componentMoved in interface ComponentListener

Parameters:

e - the event to be processed

componentShown

public void componentShown(ComponentEvent e)

Invoked when the component has been made visible.

Specified by:

componentShown in interface ComponentListener

Parameters:

e - the event to be processed

componentHidden

public void componentHidden(ComponentEvent e)

Invoked when the component has been made invisible.

Specified by:

componentHidden in interface ComponentListener

Parameters:

e - the event to be processed