--- old/src/java.desktop/share/classes/java/awt/DefaultKeyboardFocusManager.java	2020-08-05 16:55:12.806154000 -0700
+++ new/src/java.desktop/share/classes/java/awt/DefaultKeyboardFocusManager.java	2020-08-05 16:55:12.221023100 -0700
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -96,6 +96,11 @@
         });
     }
 
+    /**
+     * Constructs a {@code DefaultKeyboardFocusManager}.
+     */
+    public DefaultKeyboardFocusManager() {}
+
     private static class TypeAheadMarker {
         long after;
         Component untilFocused;