// First, instantiate the Client object.
Client client = new Client(
  // This is the interface the client will listen on (you might need something
  // else than localhost here).
  InetAddress.getLocalHost(),

  // Load the torrent from the torrent file and use the given
  // output directory. Partials downloads are automatically recovered.
  SharedTorrent.fromFile(
    new File("/path/to/your.torrent"),
    new File("/path/to/output/directory")));

// You can optionally set download/upload rate limits
// in kB/second. Setting a limit to 0.0 disables rate
// limits.
client.setMaxDownloadRate(50.0);
client.setMaxUploadRate(50.0);

// At this point, can you either call download() to download the torrent and
// stop immediately after...
client.download();

// Or call client.share(...) with a seed time in seconds:
// client.share(3600);
// Which would seed the torrent for an hour after the download is complete.

// Downloading and seeding is done in background threads.
// To wait for this process to finish, call:
client.waitForCompletion();

// At any time you can call client.stop() to interrupt the download.

// First, instantiate a Tracker object with the port you want it to listen on.
// The default tracker port recommended by the BitTorrent protocol is 6969.
Tracker tracker = new Tracker(new InetSocketAddress(6969));

// Then, for each torrent you wish to announce on this tracker, simply created
// a TrackedTorrent object and pass it to the tracker.announce() method:
FilenameFilter filter = new FilenameFilter() {
  @Override
  public boolean accept(File dir, String name) {
    return name.endsWith(".torrent");
  }
};

for (File f : new File("/path/to/torrent/files").listFiles(filter)) {
  tracker.announce(TrackedTorrent.load(f));
}

// Once done, you just have to start the tracker's main operation loop:
tracker.start();

// You can stop the tracker when you're done with:
tracker.stop();