Querying Input in Joomla 3x Print

How to pull request / input / cookie parameters in Joomla.

// General Request - REQUEST dataset
JFactory::getApplication()->input->get('key', $default);

// GET specific dataset
JFactory::getApplication()->input->get->get('key');

// POST specific dataset
JFactory::getApplication()->input->post->get('key');

// COOKIE specific dataset
JFactory::getApplication()->input->cookie->get('key');