The client can specify information to control the output of a server

  
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

public class AnotherBeerServer {
  public static void main(String args[]) throws Exception {
    ServerSocket ssock = new ServerSocket(1234);
    System.out.println("Listening");
    Socket sock = ssock.accept();
    ssock.close(); // no more connects

    PrintStream ps = new PrintStream(sock.getOutputStream());

    // ask for count
    ps.print("count? ");
    BufferedReader input = new BufferedReader(new InputStreamReader(sock
        .getInputStream()));

    // read and parse it
    String line = input.readLine();
    ps.println("");
    int count = Integer.parseInt(line);
    for (int i = count; i >= 0; i--) {
      ps.println(i + " Java Source and Support.");
    }
    ps.close();
    sock.close();
  }
}

1.	A generic framework for a flexible, multi-threaded server
2.	Server allows connections on socket 6123
3.	This server displays messages to a single client
4.	A server can use specialized streams to deliver typed data
5.	Serve entire objects using ObjectOutputStream
6.	A multithreaded server
7.	Base class to build multithreaded servers easily
8.	Manage a pool of threads for clients
9.	Client estimates the speed of the network connection to the server
10.	This server retrieves the time using the RFC867 protocol.
11.	Quote Server
12.	Logging Server based on SocketServer
13.	Client and Server Demo
14.	Reflector
15.	Simple Http Server

The client can specify information to control the output of a server : Server « Network Protocol « Java

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