src/java.desktop/share/classes/java/awt/desktop/ScreenSleepEvent.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -20,12 +20,17 @@
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
+
 package java.awt.desktop;
 
+import java.awt.Desktop;
+import java.awt.GraphicsEnvironment;
+import java.awt.HeadlessException;
+
 /**
  * Event sent when the displays attached to the system enter and exit power save
  * sleep.
  *
  * @see ScreenSleepListener#screenAboutToSleep(ScreenSleepEvent)

@@ -36,10 +41,17 @@
 public final class ScreenSleepEvent extends AppEvent {
 
     private static final long serialVersionUID = 7521606180376544150L;
 
     /**
-     * Constructs a ScreenSleepEvent
+     * Constructs a {@code ScreenSleepEvent}.
+     *
+     * @throws HeadlessException if {@link GraphicsEnvironment#isHeadless()}
+     *         returns {@code true}
+     * @throws UnsupportedOperationException if Desktop API is not supported on
+     *         the current platform
+     * @see Desktop#isDesktopSupported()
+     * @see java.awt.GraphicsEnvironment#isHeadless
      */
     public ScreenSleepEvent() {
     }
 }