/*

* Copyright (c) 1996, 2013, 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://docs.oracle.com/javase/tutorial/uiswing/events/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);

}