src/java.base/share/classes/java/util/Locale.java

*** 3232,3241 ****
--- 3232,3242 ----
           * Returns an informative string representation of this {@code LanguageRange}
           * object, consisting of language range and weight if the range is
           * weighted and the weight is less than the max weight.
           *
           * @return a string representation of this {@code LanguageRange} object.
+          * @since 9
           */
          @Override
          public String toString() {
              return (weight == MAX_WEIGHT) ? range : range + ";q=" + weight;
          }