Default Request parameters in actionRequest

In Liferay, Apart from the request parameter values it gives 2 more additional parameters.

 1.formDate    -  Date
 2.javax.portlet.action - Method you have called.

We can retrieve the parameters from the actionRequest as

 ParamUtil.getString(actionRequest, "title"); 

I have seen the parameters from the below code as follows

 Map<String, String[]> requestMap = actionRequest.getParameterMap();
               
                Set<Entry<String, String[]>> set = requestMap.entrySet();
           Iterator<Entry<String, String[]>> it = set.iterator();
         
           while (it.hasNext()) {
            Map.Entry<String, String[]> entry = (Entry<String, String[]>) it.next();
                        System.out.println("entry ===="+entry.getKey());
                        String[] paramValues = entry.getValue();
               for (int i = 0; i < paramValues.length; i++) {
                                System.out.println("values ===="+paramValues[i]); 
               }
                        }