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java.awt.event
class FocusAdapter
- All Implemented Interfaces:
- FocusListener
- Direct Known Subclasses:
- BasicSplitPaneUI.FocusHandler, BasicTabbedPaneUI.FocusHandler
public abstract class FocusAdapter
extends Object
implements FocusListener
An abstract adapter class for receiving keyboard focus events.
The methods in this class are empty. This class exists as
convenience for creating listener objects.
Extend this class to create a FocusEvent listener
and override the methods for the events of interest. (If you implement the
FocusListener 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 the extended class and then register it with
a component using the component's addFocusListener
method. When the component gains or loses the keyboard focus,
the relevant method in the listener object is invoked,
and the FocusEvent is passed to it.
| Method Summary |
void |
Invoked when a component gains the keyboard focus.
|
void |
Invoked when a component loses the keyboard focus.
|
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
FocusAdapter
public FocusAdapter()
-
focusGained
public void focusGained(FocusEvent e)
-
Invoked when a component gains the keyboard focus.
- Parameters:
e
focusLost
public void focusLost(FocusEvent e)
-
Invoked when a component loses the keyboard focus.
- Parameters:
e
This documentation differs from the official API.
Jadeite adds
extra features to the API including:
variable font sizes,
constructions examples,
placeholders for classes and methods, and auto-generated “See Also” links.
Additionally it
is missing some items found in standard Javadoc documentation, including:
generics type information,
“Deprecated” tags and comments,
“See Also” links,
along with other minor differences.
Please send any questions or feedback to
bam@cs.cmu.edu.
This page displays the
Jadeite version of the documention, which is derived from the offical documentation that contains this copyright notice:
The official Sun™ documentation can be found here at
http://java.sun.com/javase/6/docs/api/.
java.awt.event.FocusAdapter