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

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 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

@@ -94,10 +94,15 @@
                 return null;
             }
         });
     }
 
+    /**
+     * Constructs a {@code DefaultKeyboardFocusManager}.
+     */
+    public DefaultKeyboardFocusManager() {}
+
     private static class TypeAheadMarker {
         long after;
         Component untilFocused;
 
         TypeAheadMarker(long after, Component untilFocused) {