code: private String fontAvailable(String family, String[] avail)
      {
          for (int i = 0; i < avail.length; i++)
              if (avail[i].equalsIgnoreCase(family)) return avail[i];
          return null;
      }
docs: Returns true if the font family is available.
  @return The exact name of the font family or null if it's not available