for (int j = 0; j < users.length; j++) if (users[j].getTrack(tracks[i]) != null)
for (int j = 0; j < sd.length; j++) if (sd[j] != null && sd[j].getTrack(tracks[i]) != null)
  public ServerDatabase findOrphans() {    ServerDatabase orphans = new ServerDatabase();    Track[] tracks = getTracks();    ServerDatabase[] users = userList.getUsers();    for (int i = 0; i < tracks.length; i++) {      add: {        for (int j = 0; j < users.length; j++)           if (users[j].getTrack(tracks[i]) != null)            break add;        orphans.add(tracks[i]);      }    }    return orphans;  }