PokeAppMain.java

import javafx.application.Application;
import javafx.scene.image.Image;
import javafx.stage.Stage;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.util.*;
import java.util.*;

public class PokeAppMain extends Application
{
   public static void main(String[] args) {
      launch(args);
   }
   @Override
   public void start(Stage stage) throws Exception
   {
      // Load the GUI from FXML built in Scene Builder
      Parent root = FXMLLoader.load(Objects.requireNonNull(getClass().getResource("PokeApp.fxml")));
      Scene scene = new Scene(root);      
      stage.setTitle("PokePics App");
      stage.getIcons().add(new Image("pokeballicon.png"));
      // The stylesheet is currently set in Scene Builder
      // Note you can also load this programmatically
      // scene.getStylesheets().add("styles.css");

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

   }
   @Override
   public void stop() {
      System.out.println("Stop is called in Application class");
   }
}