8253322: Update the specification in the newly added constructors

Reviewed-by: psadhukhan, prr

Author: mrserb

src/java.desktop/share/classes/java/applet/Applet.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1995, 2018, 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
@@ -579,7 +579,7 @@ protected class AccessibleApplet extends AccessibleAWTPanel {
         private static final long serialVersionUID = 8127374778187708896L;
 
         /**
-         * Constructs an {@code AccessibleApplet}
+         * Constructs an {@code AccessibleApplet}.
          */
         protected AccessibleApplet() {}
 

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

@@ -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
@@ -538,7 +538,7 @@ protected class AccessibleAWTButton extends AccessibleAWTComponent
         private static final long serialVersionUID = -5932203980244017102L;
 
         /**
-         * Constructs an {@code AccessibleAWTButton}
+         * Constructs an {@code AccessibleAWTButton}.
          */
         protected AccessibleAWTButton() {}