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
Constructor | Description |
---|---|
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 Detail
ComponentAdapter
public ComponentAdapter()
Method Detail
componentResized
public void componentResized(ComponentEvent e)
Invoked when the component's size changes.
- Specified by:
-
componentResized
in interfaceComponentListener
- Parameters:
-
e
- the event to be processed
componentMoved
public void componentMoved(ComponentEvent e)
Invoked when the component's position changes.
- Specified by:
-
componentMoved
in interfaceComponentListener
- 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 interfaceComponentListener
- 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 interfaceComponentListener
- Parameters:
-
e
- the event to be processed