HelloFX.java

package com.example;

import io.github.cdimascio.dotenv.Dotenv;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.stage.Stage;

public class HelloFX extends Application {

    @Override
    public void start(Stage stage) throws Exception {

        FXMLLoader fxmlLoader = new FXMLLoader(HelloFX.class.getResource("hello-view.fxml"));
        Parent root = fxmlLoader.load();
        Scene scene = new Scene(root, 540, 650);
        stage.setTitle("CatCode Messenger");
        stage.getIcons().add(new Image(getClass().getResourceAsStream("/coolCat.png")));

        stage.setScene(scene);
        stage.show();
    }

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

}