request.getRealPath jsp new method

Code:

---

                File f = new File(request.getRealPath("addons"));
                String[] files = f.list();
                java.util.Arrays.sort(files);
                if (files.length > 0)
                {
                        for (int i=0; i<files.length; i++)
                        {
                                  f = new File(request.getRealPath("addons") + "/" + files[i]);
                                  if (f.isDirectory())
                                {
                                        out.println("<tr><td align=\"center\" style=\"border-top: 1px solid #cccccc;\"><a href=\"../../index.jsp?plugin=" + files[i] + "\" target=\"_parent\">" + files[i] + "</a></td></tr>");
                                    }
                          }
                }

---

i think lates java version changed some functions

Code:

---

File f = new File(request.getRealPath("addons"));

---

this isnt working, anyone can tell me what is the new method. i fixed everything for new version all others working but im stuck with addons. im not too much good at jsp but im very good at php so i will be able to understand easy if you explain me.

Edit :
my java version
javac 1.7.0_79

Thank you
RaZoR