code: public static String decode(String string, String enc) throws UnsupportedEncodingException {
      return new String(decode(string.getBytes(enc)), enc);
    }
docs: Decode a Base64 encoded String. Characters that are not part of the Base64 alphabet are ignored
  in the input.
  
  @param string The data to decode.
  @param enc Character encoding to use when converting to and from bytes.
  @return A decoded String.
  @throws UnsupportedEncodingException if the character encoding specified is not supported.
  @since ostermillerutils 1.00.00