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

*** 1,7 ****
  /*
!  * Copyright (c) 2016, 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
--- 1,7 ----
  /*
!  * 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
*** 23,32 ****
--- 23,36 ----
   * questions.
   */
  
  package java.awt.desktop;
  
+ import java.awt.Desktop;
+ import java.awt.GraphicsEnvironment;
+ import java.awt.HeadlessException;
+ 
  /**
   * Event sent when the system enters and exits power save sleep.
   *
   * @see SystemSleepListener#systemAboutToSleep(SystemSleepEvent)
   * @see SystemSleepListener#systemAwoke(SystemSleepEvent)
*** 36,45 ****
  public final class SystemSleepEvent extends AppEvent {
  
      private static final long serialVersionUID = 11372269824930549L;
  
      /**
!      * Constructs a SystemSleepEvent
       */
      public SystemSleepEvent() {
      }
  }
--- 40,56 ----
  public final class SystemSleepEvent extends AppEvent {
  
      private static final long serialVersionUID = 11372269824930549L;
  
      /**
!      * Constructs a {@code SystemSleepEvent}.
!      *
!      * @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 SystemSleepEvent() {
      }
  }