import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.text.Text;

public class App extends Application{
    @Override
    public void start(Stage stage){
        GridPane root = new GridPane();
        HBox hbox = new HBox(new Text("A"), new Text("B"));

        root.add(hbox, 0,0);
        Text c = new Text("C");
        Text d = new Text("D");
        Text e = new Text("E");
        root.add(c, 1, 0);
        root.add(d, 0, 1);
        root.add(e, 1, 1);
        Scene scene = new Scene(root);
        stage.setScene(scene);
        root.setHgap(10);
        root.setVgap(10);
        stage.setMinWidth(200);
        stage.show();
    }
}