[FIXED] Why is Intellij not allowing me to use VBox class?

Issue

In my Intellij IDEA, I am receiving an error that it "Cannot resolve symbol 'VBox'". I have clearly imported VBox with:

import javafx.scene.layout.VBox

Is there a fix? My current code is below:

package sample;

import javafx.application.Application;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;
import javafx.stage.*;

public class Main extends Application {
    Scene scene1, scene2;
    Stage window;

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

    @Override
    public void start(Stage primaryStage) {
        Label label1 = new Label("This is scene one!");
        Button button1 = new Button("Go to scene two!");
        button1.setOnAction(event -> window.setScene(scene2));

        Vbox layout1 = new VBox(20);
        layout1.getChildren().addAll(label1, button1);
    }
}

Solution

Wrong: Vbox layout1 = new VBox(20);

Correct: VBox layout1 = new VBox(20);

It's called VBox, not Vbox. Upper/lowercase matters a lot in programming.

Answered By - Nand