java - Play Framework Error on BindRequest -

i'm getting following error on play 2.1.3: [runtimeexception: cannot instantiate class controllers.application$user. must have default constructor]

here's application.java file...i can't tell i'm doing wrong! occurs when make post request /login.

package controllers;  import play.mvc.*; import play.data.*; import views.html.*;  public class application extends controller {      private static boolean loggedin = false;     private static user currentuser;     private static form<user> loginform = form.form(user.class);      public static result index() {          string message, title;          if(!loggedin)         {             title = "login";             message = "please log in.";         }         else         {             title = "welcome";             message = "you logged in!";         }         return ok(index.render(title, message, loggedin));     }      public static result login() {          currentuser = loginform.bindfromrequest().get();          if(currentuser.getusername().equals("test") && currentuser.getpassword().equals("password")) {             loggedin = true;             return redirect(routes.application.index());         }         else {             string title = "login";             string message = "an error occurred. please try logging in again.";             return ok(index.render(title, message, loggedin));         }     }      static class user {         private string username;         private string password;          public user() {             this.username = "";             this.password = "";         }          public string getusername() {             return this.username;         }         public string getpassword() {             return this.password;         }     }  } 

your user class required have default constructor. providing constructor no formal paramaters, have overridden default constructor, therefore 1 not being generated @ compile time. try removing constructor , see if fixes problem.