Add, delete, modify and check cookies

new

cookie.setPath(request.getContextPath());

                    cookie . setMaxAge ( 24 * 60 * 60 ) ; // Valid for 24h (unit is seconds)

                    answer . addCookie ( cookie ) ;

Modify & delete (essentially file overwriting)

cookie.setPath(request.getContextPath());

                        cookie.setMaxAge ( 0 ) ; // Delete the application in this cookie (valid for 0 seconds)

                        response.addCookie(cookie);

Inquire

Cookie[] cookies = request.getCookies();

    if(cookies != null){

      for (Cookie c : cookies) {

         Action to perform (get the cookie's name and value)

      }        

 }

delete

Essentially reset and overwrite