//*****
import java.net.Socket;
import java.net.ServerSocket;
import java.util.Map;
import java.util.HashMap;
import java.util.Random;
import java.io.ObjectOutputStream;
public class SerialS {
    public static void main(String[ ] args) throws Exception {
        ServerSocket ssock = new ServerSocket(9876);
        Map map = new HashMap();
        Random r = new Random();
        // Serialize a Map of random integers to clients.
        while (true) {
           map.clear();   // remove any elements
           Socket sock = ssock.accept();
           int how_many = Math.abs(r.nextInt()) % 5;
           // Populate a map with how_many ints: 
           //  key is in decimal, value in hexadecimal
           for (int i = 0; i < how_many; i++) {
               int n = r.nextInt();
               map.put(new Integer(n), Integer.toHexString(n));
           }
           ObjectOutputStream out = 
               new ObjectOutputStream(sock.getOutputStream());
           out.writeObject(map);
           out.flush();
           out.close();
        }
    }
}