import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.scene.control.Label;
import javafx.scene.control.Button;
import javafx.event.EventHandler;
import javafx.event.ActionEvent;
import javafx.geometry.Pos;
import javafx.scene.control.TextField;

public class HeiPerson extends Application {

    public TextField tekstfelt = null;

    @Override
    public void start(Stage stage) {

        // Fyll inn!

        stage.setScene(new Scene( ??? ));
        stage.show();

    }

    class KnappBehandler implements EventHandler<ActionEvent> {

        // Fyll inn! 

    }
}