public void setTcpNoDelay(boolean on) throws SocketException { if (impl == null) throw new SocketException("Not connected");
public void setTcpNoDelay(boolean on) throws SocketException { if (isClosed()) throw new SocketException("socket is closed");
	public void setTcpNoDelay(boolean on) throws SocketException {		if (impl == null)			throw new SocketException("Not connected");		impl.setOption(SocketOptions.TCP_NODELAY, new Boolean(on));	}