can not be cast to FXML loader (Java)

Question

Hi, Im kind of new to Java FXML and I wanted to use two fxml files for sharing data but when I call the second stage, the console trhows the " BorderPane can not be cast to FXML loader " error. Basically I want to use two controllers (java files) each one with its fxml file, but when I want to render the new Stage, I got the previous error that I mentioned.

I have the following java files.

//The main java file
package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root, 800, 500));
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}

//controller java file for the sample.fxml
public class Controller {
   /* public void metodo(ActionEvent actionEvent) {
        saludar();
        out.println(calcular());
        out.println(lado1+lado2);
    }*/
   @FXML
   private BorderPane pane;
   @FXML
    TextField usuarioMain;
    public void logIn() throws IOException {
        FXMLLoader loader = FXMLLoader.load(getClass().getResource("emergente.fxml"));
        myControl control= new myControl();
        control.captura(usuarioMain.getText());
        control.mostrar();
         pane=(BorderPane)loader.load();
        Scene scene = new Scene(pane, 400, 275);
        Stage stage= new Stage();

        out.print(usuarioMain.getText());
        stage.setTitle("respuesta de login");
        stage.setScene(scene);
        stage.show();
    }
}

The main.java has no problem, but in the Controller Class when I want to render a new Stage, the IDE throws the cast error that I dont know how to handle, because I was googling and did not found how to solve this. I dont know what part of the cast is wrong..I hope you can help me. Its the only that I need to proceed

Answer 1 · 2016-11-15T09:48:51Z

November 15, 2016 9:48am

It is hard to help, unless you push project on GitHub, and share a link here.

Not a JavaFx expert, but judging by the code, I think the problem is in this line

 FXMLLoader loader = FXMLLoader.load(getClass().getResource("emergente.fxml"));
 pane=(BorderPane)loader.load();

Because you are casting FXMLLoader to BorderPane ....

I can't say more.

Check answer here. The person is also trying to cast improperly

http://stackoverflow.com/questions/27556536/javafx-scene-layout-pane-cannot-be-cast-to-javafx-fxml-fxmlloader

Judging from another post down here

http://stackoverflow.com/questions/10751271/accessing-fxml-controller-class

In the second answer person is doing the following:

Parent root = FXMLLoader.load(me.getClass().getResource("Form.fxml"));
Label lblData = (Label) root.lookup("#lblData");
if (lblData!=null) lblData.setText(strData);

This way I guess he is casting root.lookUp to Label, an not the loader.load() directly, like you do ...

Here is also post about usage of two controllers I think

http://stackoverflow.com/questions/19342259/how-to-create-multiple-javafx-controllers-with-different-fxml-files

I strongly recommend to find some tutorials online about how to do two Controllers and two scenes, like this one for example

http://javajdk.net/tutorial/multiple-javafx-scenes-sharing-one-menubar/

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raul cortes

raul cortes

can not be cast to FXML loader (Java)

1 Answer

Alexander Nikiforov

Alexander Nikiforov