Setting max_Retrieve and sort_list parameter in getListEntryObjects

I am a newbie in AR System Java API.

I was going trough the code the below code.

String formName = "some_formname";String qualificationString = "$1$ = \"" + entryId +"\"";int firstRetrieve = 0;int max_Retrieve = 0;List sort_list = null;boolean UseLocale = false;OutputInteger nmatches = null;ARServerUser=context    Myentries = context.getListEntryObjects(formName, qualification, firstRetrieve, max_Retrieve , sort_list, fieldIds, UseLocale, nmatches);

This returns 0 entires. I suspect if its due to the max_Retrieve and sort_list. I dont know the total or maximum entries present. Please provide any inputs on why this is returning 0 entries, and how can I get the required entries from this statement.