Error in Setting Vbox inside Border pane Center on click of button

Question

I am designing an javafx application using BorderPane as Rootlayout inside the border pane there is button on left. on Click of which i need to set the borderpane(rootlayout) center to a different addprodct.fxml . i want to add a vbox on Click on Insert Button inside Center of BorderPane.

I checked if my fxml is getting loaded properly or not with this System.out.println("view folder: " + RootController.class.getResource("/Views/AddProduct.fxml")); its print exact path to fxml. i tried to Setting Stage with the new fxml to see if it loads properly and it worked properly.

        FXMLLoader loader = new FXMLLoader();
        System.out.println("view folder: " + RootController.class.getResource("/Views/AddProduct.fxml"));
        loader.setLocation(RootController.class.getResource( "/Views/AddProduct.fxml"));
        tryvbox = loader.load();
        main.getPrimaryStage().setScene(new Scene(tryvbox));

Yes, i know same question already have been asked but i implemented the solution given neither helped my problem. Load new fxml in borderpane center

JavaFX: How to update the center view of a borderpane with new values

Main.java


    package sample;

    import Controllers.RootController;
    import javafx.application.Application;
    import javafx.fxml.FXML;
    import javafx.fxml.FXMLLoader;
    import javafx.scene.Scene;
    import javafx.scene.layout.BorderPane;
    import javafx.stage.Stage;
    import java.io.IOException;


    public class Main extends Application {
        @FXML
        private BorderPane rootLayout;
        private Stage  primaryStage;
        @Override
        public void start(Stage primaryStage) throws Exception{
            this.primaryStage = primaryStage;
            mainwindow();
        }
        public void mainwindow() throws IOException {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(getClass().getResource("/Views/Rootlayout.fxml"));
            rootLayout = loader.load();

            RootController rootController = loader.getController();
            rootController.setMain(this);
            Scene scene= new Scene(rootLayout);
            primaryStage.setTitle("Inventory Manager");
            primaryStage.setScene(scene);
            primaryStage.show();
        }
        public BorderPane getRootLayout() {
            return rootLayout;
        }

        public Stage getPrimaryStage() {
            return primaryStage;
        }

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

RootController.java

package Controllers;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.VBox;
import sample.Main;

import java.io.IOException;

public class RootController {
    @FXML
    private Button rootBtnInsrt;
    @FXML
    private Button rootBtnUpdate;
    @FXML
    private BorderPane rootLayout;
    private Main main;

    public void setMain(Main main) {
        this.main = main;
    }

    @FXML
    void btnInsrtClick(MouseEvent event) {
        FXMLLoader loader = new FXMLLoader();
        loader.setLocation(RootController.class.getResource( "/Views/AddProduct.fxml"));
        try {
            VBox addProduct1 = loader.load();
        } catch (IOException e) {
            e.printStackTrace();
        }

        AddProductController addProductController= loader.getController();
        addProductController.setMain(main);
        main.getRootLayout().setCenter(rootLayout);
    }
}

rootlayout.fxml

Addproduct.fxml

when tried running the following code i get error.

Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
Caused by: java.lang.reflect.InvocationTargetException
Caused by: java.lang.NullPointerException

all in same error pane this is my directory structure. Directory Structure

Error in Setting Vbox inside Border pane Center on click of button

Answers (1)

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