public static void main(String[] args) throws InterruptedException {
Scanner cin = new Scanner(System.in);
Peers p1 = new Peers(P1ID, P1UploadPort, P1DownloadPort, CheckPort[0]);
p1.sum = new File("C:/users/ben/Desktop/Peers/P" + p1.PeerID + "/summary" + ".txt");
p1.downloadfromServer();
Uploading upload = new Uploading(p1);
Thread t1 = new Thread(upload);
Downloading t2 = new Downloading(p1);
t1.start();
p1.waitforDownloading();
Thread.sleep(1000); // 否则会downloadPort开了，但是对应的uploadPort还没开启。
t2.start();
}
