Find a Duplicate File...

We had a problem with duplicate XML files showing up to be loaded in an app.  After a quick search on the web, the suggestion was to do Checksums. I came up with this:

private boolean isDuplicateFile(String fileName, String path, String backupPath) throws IOException, FileNotFoundException {

  File theFile = new File(MEDUtils.addToFilePath(path, fileName));
  if (!theFile.exists()) {
   throw new FileNotFoundException(MEDUtils.addToFilePath(path, fileName));
  }
  long fileChecksum = FileUtils.checksumCRC32(theFile);

  File[] files = new File(backupPath).listFiles();
  long[] checksums = new long[files.length];
  for (int i = 0; i < files.length; i++) {
   long checksum = FileUtils.checksumCRC32(files[i]);
   new MEDInfoEvent(this, "checkForDuplicateFiles()", "File name: " + files[i].getName() + " checksum: [" + checksum + "]");
   checksums[i] = checksum;
  }
  return ArrayUtils.contains(checksums, fileChecksum);
 }