1 /*
   2  * Copyright (c) 2016, 2018, 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
  23  * questions.
  24  */
  25 
  26 package java.awt.desktop;
  27 
  28 import java.awt.Desktop;
  29 import java.awt.GraphicsEnvironment;
  30 import java.awt.HeadlessException;
  31 
  32 /**
  33  * Event sent when the application has become the foreground app, and when it is
  34  * no longer the foreground app.
  35  *
  36  * @see AppForegroundListener#appRaisedToForeground(AppForegroundEvent)
  37  * @see AppForegroundListener#appMovedToBackground(AppForegroundEvent)
  38  *
  39  * @since 9
  40  */
  41 public final class AppForegroundEvent extends AppEvent {
  42 
  43     private static final long serialVersionUID = -5513582555740533911L;
  44 
  45     /**
  46      * Constructs an {@code AppForegroundEvent}.
  47      *
  48      * @throws HeadlessException if {@link GraphicsEnvironment#isHeadless()}
  49      *         returns {@code true}
  50      * @throws UnsupportedOperationException if Desktop API is not supported on
  51      *         the current platform
  52      * @see Desktop#isDesktopSupported()
  53      * @see java.awt.GraphicsEnvironment#isHeadless
  54      */
  55     public AppForegroundEvent() {
  56     }
  57 }