Test.java

import java.io.IOException;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

public class Test extends Application {
    @Override
    public void start(Stage stage) throws Exception {
        StackPane root = new StackPane();

        WebView view = new WebView();
        WebEngine engine = view.getEngine();
        engine.load("http://localhost:8080/");
        root.getChildren().add(view);
        
        Scene scene = new Scene(root, 800, 600);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) throws IOException {
        Application.launch(args);
    }
}