--- old/src/java.desktop/share/classes/java/awt/Toolkit.java	2020-08-05 16:55:19.383043100 -0700
+++ new/src/java.desktop/share/classes/java/awt/Toolkit.java	2020-08-05 16:55:18.805900400 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1995, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1995, 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
@@ -136,6 +136,11 @@
  */
 public abstract class Toolkit {
 
+    /**
+     * Constructs a {@code Toolkit}.
+     */
+    protected Toolkit() {}
+
     // The following method is called by the private method
     // <code>updateSystemColors</code> in <code>SystemColor</code>.