public void cat(String dividedFileDirName) {
   dividedData = new DividedData(dividedFileDirName);
   catData.dividedFileList(dividedData.getDividedFileDir());
 }
 public void combinData(String dividedFileDirName) {
   dividedData = new DividedData(dividedFileDirName);
   combineBigData.divRestore(dividedData.getDividedFileDir());
 }