src/java.desktop/share/classes/java/awt/dnd/DropTargetAdapter.java

*** 1,7 ****
  /*
!  * Copyright (c) 2001, 2003, 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) 2001, 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
*** 71,80 ****
--- 71,85 ----
   * @since 1.4
   */
  public abstract class DropTargetAdapter implements DropTargetListener {
  
      /**
+      * Constructs a {@code DropTargetAdapter}.
+      */
+     protected DropTargetAdapter() {}
+ 
+     /**
       * Called while a drag operation is ongoing, when the mouse pointer enters
       * the operable part of the drop site for the {@code DropTarget}
       * registered with this listener.
       *
       * @param dtde the {@code DropTargetDragEvent}