// Simple code for Java, there may be other ways.

/**
 * First, define a class that handles a single connection
 */

class OneClientConnection extends Thread 
{
    protected Socket fClientSocket = null;
    // whatever extra data structure you need to define here

    public OneClientConnection(Socket clientSocket)
    {
	fClientSocket = clientSocket;
	this.start();
    }

    public void run()
    {
	// do your communication using fClientSocket
    }
}

/**
 * We need a class to handle the accept() operation,
 * and to start each connection.
 */

public class MultiClientServer extends Thread 
{
    protected int fPort;
    protected ServerSocket fListenSocket = null;
    // define all the necessary structures

    public MultiClientServer(int port)
    {
	if (port == 0)
	    port = DEFAULT_PORT;
	fPort = port;
	    
    }

    public void run()
    {
	// do all the necessary initializing steps about a socket ...
	// DO NOT FORGET EXCEPTION HANDLING

	while (true) {
	    Socket clientSocket = fListenSocket.accept();
	    OneClientConnection occ = new OneClientConnection(clientSocket);
	}
	
    }

}