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

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
+ * 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

@@ -66,10 +66,16 @@
  * @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/mouselistener.html">Tutorial: Writing a Mouse Listener</a>
  *
  * @since 1.1
  */
 public abstract class MouseAdapter implements MouseListener, MouseWheelListener, MouseMotionListener {
+
+    /**
+     * Constructs a {@code MouseAdapter}.
+     */
+    protected MouseAdapter() {}
+
     /**
      * {@inheritDoc}
      */
     public void mouseClicked(MouseEvent e) {}