code: private static Data loadLeapSeconds(URL url) throws ClassNotFoundException, IOException {
          List<String> lines;
          try (BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream(), StandardCharsets.UTF_8))) {
              lines = reader.lines().collect(Collectors.toList());
          }
          List<Long> dates = new ArrayList<>();
          List<Integer> offsets = new ArrayList<>();
          for (String line : lines) {
              line = line.trim();
              if (line.isEmpty() || line.startsWith("#")) {
                  continue;
              }
              Matcher matcher = LEAP_FILE_FORMAT.matcher(line);
              if (matcher.matches() == false) {
                  throw new StreamCorruptedException("Invalid leap second file");
              }
              dates.add(LocalDate.parse(matcher.group(1)).getLong(JulianFields.MODIFIED_JULIAN_DAY));
              offsets.add(Integer.valueOf(matcher.group(2)));
          }
          long[] datesData = new long[dates.size()];
          int[] offsetsData = new int[dates.size()];
          long[] taiData = new long[dates.size()];
          for (int i = 0; i < datesData.length; i++) {
              datesData[i] = dates.get(i);
              offsetsData[i] = offsets.get(i);
              taiData[i] = tai(datesData[i], offsetsData[i]);
          }
          return new Data(datesData, offsetsData, taiData);
      }
docs: Loads the leap second rules from a URL, often in a jar file.
  
  @param url  the jar file to load, not null
  @throws Exception if an error occurs