echoclient reading from server

i have written an echoclient that connects to a server,takes input
from user and writes to server.I want the client to read from the
server and show it

this is what i wrote

import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.net.*;
public class EchoClient {
    int port;
    ByteBuffer buf=ByteBuffer.allocate(1024);
    public EchoClient(int p)throws IOException{
        port=p;
        initClient();
    }
    private void initClient()throws IOException{
        InetSocketAddress isa=new
InetSocketAddress(InetAddress.getLocalHost(),port);
        SocketChannel sc=SocketChannel.open(isa) ;
        if(sc!=null)debug("connected to server");
        BufferedReader userin=new BufferedReader(new
InputStreamReader(System.in));
        String userinput;
        while((userinput=userin.readLine())!=null){
            buf.clear();
            buf.put(userinput.getBytes());
            buf.flip();
            sc.write(buf);
            if(userinput.equals("bye"))break;
        }

        //how to read from server?

    }

    public static void main(String[] args) {
        if (args.length !=1)debug("EchoClient port");
        try{
            new EchoClient(Integer.parseInt(args[0]));

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

    }
    public static void debug(String msg){
        System.out.println(msg);
    }
}

i am not very sure how to do the reading from the server part..can
someone help?

jim