javafx in vscode and no build tools

App.java

// jfx imports
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

// java lib imports
import java.io.File;
import java.net.URL;

public class App extends Application{

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        FXMLLoader loader = new FXMLLoader();

        MyFxmlController controller = new MyFxmlController();
        controller.setValue("New value");
        loader.setController(controller);

        File fxmlFile = new File("src\\assets\\fxml\\helloworld.fxml");
        URL fxmlUrl = fxmlFile.toURI().toURL();
        loader.setLocation(fxmlUrl);

        VBox vbox = loader.<VBox>load();

        // controller for fxml
        MyFxmlController controllerRef = loader.getController();
        // printing button text getters
        System.out.println(controllerRef.getValue());
        System.out.println(controllerRef.getLabel1Text());
        System.out.println(controllerRef.getLabel2Text());

        Scene scene = new Scene(vbox);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

helloworld.fxml

<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Button?>
<VBox xmlns:fx="http://javafx.com/fxml" spacing="20">
    <children>
        <Label fx:id="label1" text="Line 1"/>
        <Label fx:id="label2" text="Line 2"/>
        <Button fx:id="button1" text="Click me!" onAction="#buttonClicked"/>
    </children>
</VBox>

launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "name": "Launch Current File",
            "request": "launch",
            "mainClass": "${file}"
        },
        {
            "type": "java",
            "name": "Launch App",
            "request": "launch",
            "mainClass": "App",
            "projectName": "partnar_erp_dedc8781",
            "vmArgs":
                "--module-path ${workspaceFolder}/lib/javafx-sdk-17.0.1/lib --add-modules javafx.controls,javafx.fxml"
        }
    ]
}

MyFxmlController.java

import javafx.event.Event;
import javafx.fxml.FXML;
import javafx.scene.control.Label;

public class MyFxmlController {
    private String value = "Default value";
    public Label label1 = null;
    public Label label2 = null;

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }

    public void initialize() {
        System.out.println("Initialized MyFxmlController");
    }

    public String getLabel1Text() {
        return this.label1.getText();
    }

    public String getLabel2Text() {
        return this.label2.getText();
    }

    @FXML
    public void buttonClicked(Event e){
        System.out.println("Button clicked");
    }
}