Java Socket.getTrafficClass()

public int getTrafficClass()   throws SocketException

//from   w ww . j av  a2  s.  co m
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class Main {
  public static void main(String args[]) throws Exception {
    Socket s = new Socket("internic.net", 43);
    InputStream in = s.getInputStream();
    OutputStream out = s.getOutputStream();
    String str = "asdfasdfasdf\n";
    byte buf[] = str.getBytes();
    out.write(buf);
    int c;
    while ((c = in.read()) != -1) {
      System.out.print((char) c);
    }
    
    s.setTrafficClass(1);
    System.out.println(s.getTrafficClass());
    
    s.close();
  }
}