/*
* Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.awt.event;
import java.util.EventListener;
/**
* The listener interface for receiving keyboard focus events on
* a component.
* The class that is interested in processing a focus event
* either implements this interface (and all the methods it
* contains) or extends the abstract <code>FocusAdapter</code> class
* (overriding only the methods of interest).
* The listener object created from that class is then registered with a
* component using the component's <code>addFocusListener</code>
* method. When the component gains or loses the keyboard focus,
* the relevant method in the listener object
* is invoked, and the <code>FocusEvent</code> is passed to it.
*
* @see FocusAdapter
* @see FocusEvent
* @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/focuslistener.html">Tutorial: Writing a Focus Listener</a>
*
* @author Carl Quinn
* @since 1.1
*/
public interface FocusListener extends EventListener {
/**
* Invoked when a component gains the keyboard focus.
*/
public void focusGained(FocusEvent e);
/**
* Invoked when a component loses the keyboard focus.
*/
public void focusLost(FocusEvent e);
}