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

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2001, 2003, Oracle and/or its affiliates. All rights reserved.
+ * 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

@@ -56,10 +56,15 @@
  */
 public abstract class DragSourceAdapter
     implements DragSourceListener, DragSourceMotionListener {
 
     /**
+     * Constructs a {@code DragSourceAdapter}.
+     */
+    protected DragSourceAdapter() {}
+
+    /**
      * Called as the cursor's hotspot enters a platform-dependent drop site.
      * This method is invoked when all the following conditions are true:
      * <UL>
      * <LI>The cursor's hotspot enters the operable part of
      * a platform-dependent drop site.