The code bellow is a server code that will continuesly wait for a
vector object from the client side. There are many clients that will
be connected to the server. Must I use threads to handle the many
clients?. Is it advisable to implement threads and why?

import java.net.*;
import java.util.*;
import java.io.*;
public class GandhiServer2
{
   ServerSocket ss;
   Socket cs;
   Vector ht;
   ObjectInputStream ois;
   public GandhiServer2()
   {
       try
       {
           ss = new ServerSocket(9000);
           cs = ss.accept();

           while(cs.isConnected() == true)
           {
               ois = new ObjectInputStream(cs.getInputStream());
               ht = (Vector)ois.readObject();
               System.out.println(ht);
               cs = ss.accept();
           }

       }
       catch (Exception e)
       {
           e.printStackTrace();
       }

   }

   public static void main(String[] args)
   {
       new GandhiServer2();
   }
}

Regards.