--- old/test/jdk/javax/naming/spi/DirectoryManager/DummyContext.java	2020-03-25 13:45:55.000000000 +0800
+++ new/test/jdk/javax/naming/spi/DirectoryManager/DummyContext.java	2020-03-25 13:45:55.000000000 +0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 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
@@ -31,13 +31,13 @@
 
 public class DummyContext extends InitialContext {
 
-    private Hashtable env;
+    private Hashtable<?,?> env;
 
-    DummyContext(Hashtable env) throws NamingException {
+    DummyContext(Hashtable<?,?> env) throws NamingException {
         this.env = env;
     }
 
-    public Hashtable getEnvironment() throws NamingException {
+    public Hashtable<?,?> getEnvironment() throws NamingException {
         return env;
     }
 }