public void setReceiveBufferSize(int size) throws SocketException { if (impl == null) throw new SocketException("Not connected");
public void setReceiveBufferSize(int size) throws SocketException { if (isClosed()) throw new SocketException("socket is closed");
	public void setReceiveBufferSize(int size) throws SocketException {		if (impl == null)			throw new SocketException("Not connected");		if (size <= 0)			throw new IllegalArgumentException("SO_RCVBUF value must be > 0");		impl.setOption(SocketOptions.SO_RCVBUF, new Integer(size));	}