1 /*
2 * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
34 * either implements this interface (and all the methods it
35 * contains) or extends the abstract <code>FocusAdapter</code> class
36 * (overriding only the methods of interest).
37 * The listener object created from that class is then registered with a
38 * component using the component's <code>addFocusListener</code>
39 * method. When the component gains or loses the keyboard focus,
40 * the relevant method in the listener object
41 * is invoked, and the <code>FocusEvent</code> is passed to it.
42 *
43 * @see FocusAdapter
44 * @see FocusEvent
45 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/focuslistener.html">Tutorial: Writing a Focus Listener</a>
46 *
47 * @author Carl Quinn
48 * @since 1.1
49 */
50 public interface FocusListener extends EventListener {
51
52 /**
53 * Invoked when a component gains the keyboard focus.
54 */
55 public void focusGained(FocusEvent e);
56
57 /**
58 * Invoked when a component loses the keyboard focus.
59 */
60 public void focusLost(FocusEvent e);
61 }
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1 /*
2 * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
34 * either implements this interface (and all the methods it
35 * contains) or extends the abstract <code>FocusAdapter</code> class
36 * (overriding only the methods of interest).
37 * The listener object created from that class is then registered with a
38 * component using the component's <code>addFocusListener</code>
39 * method. When the component gains or loses the keyboard focus,
40 * the relevant method in the listener object
41 * is invoked, and the <code>FocusEvent</code> is passed to it.
42 *
43 * @see FocusAdapter
44 * @see FocusEvent
45 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/focuslistener.html">Tutorial: Writing a Focus Listener</a>
46 *
47 * @author Carl Quinn
48 * @since 1.1
49 */
50 public interface FocusListener extends EventListener {
51
52 /**
53 * Invoked when a component gains the keyboard focus.
54 * @param e the event to be processed
55 */
56 public void focusGained(FocusEvent e);
57
58 /**
59 * Invoked when a component loses the keyboard focus.
60 * @param e the event to be processed
61 */
62 public void focusLost(FocusEvent e);
63 }
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