src/share/classes/java/util/Properties.java

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rev 3186 : 6880112: Project Coin: Port JDK core library code to use diamond operator
@@ -1009,11 +1009,11 @@
      *          including the keys in the default property list.
      * @see     java.util.Properties#defaults
      * @since   1.6
      */
     public Set<String> stringPropertyNames() {
-        Hashtable<String, String> h = new Hashtable<String, String>();
+        Hashtable<String, String> h = new Hashtable<>();
         enumerateStringProperties(h);
         return h.keySet();
     }
 
     /**