src/java.desktop/share/classes/java/awt/event/WindowAdapter.java

*** 1,7 ****
  /*
!  * Copyright (c) 1996, 2013, 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) 1996, 2020, 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
*** 54,63 ****
--- 54,68 ----
   */
  public abstract class WindowAdapter
      implements WindowListener, WindowStateListener, WindowFocusListener
  {
      /**
+      * Constructs a {@code WindowAdapter}.
+      */
+     protected WindowAdapter() {}
+ 
+     /**
       * Invoked when a window has been opened.
       */
      public void windowOpened(WindowEvent e) {}
  
      /**