src/java.base/share/classes/sun/util/resources/ParallelListResourceBundle.java

@@ -211,11 +211,11 @@
         @Override
         public Iterator<String> iterator() {
             if (parent == null) {
                 return set.iterator();
             }
-            return new Iterator<String>() {
+            return new Iterator<>() {
                 private Iterator<String> itr = set.iterator();
                 private boolean usingParent;
 
                 @Override
                 public boolean hasNext() {