import java.util.*;
import java.net.*;
import java.io.*;


public class lab3Server{
    
    public static void main (String args[]) throws Exception {

        ServerSocket ss = new ServerSocket (3141);
        System.out.println ("Waiting for connection:");
        Socket soc = ss.accept();
        System.out.println ("Got connection: "+soc.toString());
        OutputStreamWriter w = new OutputStreamWriter (soc.getOutputStream());
        w.write ("Hello, World!");
        w.flush();
        w.close();
        soc.close();

    }

}