Null pointer exception on Initialize second controller class from first controller class - javafx-2

Question

I am trying to access initialize method of another calss from a different class.But I am getting nullpointer Exception while returning ctroller
THis is the code I am trying to call from my second calss.
Line1- FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/src/myjavfxapp/controller/EditClientDetails.fxml"));
Line 2- EditClientDetailsController fooController = (EditClientDetailsController) fxmlLoader.getController();
Line3- fooController.initialize(null, null);
I am getting null pointer exception at line number 3.
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:75)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:279)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1435)
... 44 more
Caused by: java.lang.NullPointerException
at myjavfxapp.controller.NewUserController.saveNewuser(NewUserController.java:167)
... 54 more
My Intention is to initialize the "EditClientDetails.fxml" fields from different controller class.
Please point out if i missed anything.

Answer 1

Try the below example it working fine, you have to use load() function of FxmlLoader class.
public class Xxx extends Application {
#Override
public void start(Stage stage) throws Exception {
//Parent root = FXMLLoader.load(getClass().getResource("Sample.fxml"));
FXMLLoader loader = new FXMLLoader(getClass().getResource("Sample.fxml"));
Parent root = (Parent)loader.load();
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
SampleController controller = (SampleController)loader.getController();
}
public static void main(String[] args) {
launch(args);
}
}