code: static File[] getSortedArrayOfJournalFiles(File journalDirectory,
                                                 String filenamePrefix) {
          JournalFileFilter filter = new JournalFileFilter(filenamePrefix);
          File[] journalFiles = journalDirectory.listFiles(filter);
          Arrays.sort(journalFiles, new FilenameComparator());
          return journalFiles;
      }
docs: Get the Journal Files that exist the Journal Directory, sorted by name.