code: public static synchronized FormatSet getFormatSet() {
          if (svNumberCached == 0)
              return new FormatSet();
          else {
              FormatSet fs = svInstances.remove(0);
              --svNumberCached;
              return fs;
          }
      }
docs: Obtain a FormatSet object.
  <p>
  If one cannot be obtained from the cache, new one up.