public void close() {
if (host != null) host.close();
}
public SocketInterface newSocket() throws IOException {
if (host != null) return host.newSocket();
else return new RealSocket();
}
public ServerSocketInterface newServerSocket(int port) throws IOException {
if (host != null) return host.newServerSocket(port);
else return new RealServerSocket(port);
}
public String getHostName() throws UnknownHostException {
if (host != null) return host.getHostName();
else return InetAddress.getLocalHost().getHostName();
}
