public class ServerImplementation implements Server {

    Client clients[] = new Client[100]; 

    int index = -1; 

    public int register(Client client) {

	clients[++index] = client; 
	return index; 

    }

    public void broadcast(Update event) {

	for (int i = 0; i <= index; i++) 
            clients[i].update(event); 

    }

    public String list() {

	String result = "";
        for (int i = 0; i <= index; i++) 
	    result += "  ***(" + clients[i].name() + ")***  \n"; 

	return result;

    }

}