JavaFX Flow Pane Alignment

I am working on creating a loan calculator but now sure how to align the flow pane positioning so that everything is centered, as it is currently skewed.

enter image description here

public class Main extends Application {
 
    private HBox hboxAnnualIntRate = new HBox(lbAnnualIntRate,tfAnnualInterestRate);
    private HBox hboxNumberOfYears = new HBox(lbNumberOfYears,tfNumberOfYears);
    private HBox hboxLoanAmount = new HBox(lbLoanAmount,tfLoanAmount);
    private HBox hboxMonthlyPayment = new HBox(lbMonthlyPayment,tfMonthlyPayment);
    private HBox hboxTotalPayment = new HBox(lbTotalPayment,tfTotalPayment);

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

        primaryStage.setTitle("Loan Calculator");
        FlowPane rootNode = new FlowPane(20,20);
        rootNode.setAlignment(Pos.CENTER);
        Scene scene = new Scene (rootNode, 500, 300);
        primaryStage.setScene(scene);

      
        calculateButton.setOnAction(actionEvent -> {
            calculatePayment();
        });
        rootNode.getChildren().addAll(hboxAnnualIntRate,hboxNumberOfYears,hboxLoanAmount,hboxMonthlyPayment,hboxTotalPayment,calculateButton);
        primaryStage.show();
    }

Answer

As @trashgod mention in the comments you can use a GridPane:

public class App extends Application {

    @Override
    public void start(Stage stage) {

        Label lbl1 = new Label("Annual Interest Rate:");
        Label lbl2 = new Label("Number Of Years:");
        Label lbl3 = new Label("Loan Amount:");
        Label lbl4 = new Label("Monthly Payment:");
        Label lbl5 = new Label("Total Payment:");
    
        TextField tf1 = new TextField();
        TextField tf2 = new TextField();
        TextField tf3 = new TextField();
        TextField tf4 = new TextField();
        TextField tf5 = new TextField();
    
        Button button = new Button("Calculate");

        GridPane gp = new GridPane();
    
        gp.addColumn(0, lbl1, lbl2, lbl3, lbl4, lbl5);
        gp.addColumn(1, tf1, tf2, tf3, tf4, tf5);
        gp.add(button, 2, 4);
    
        gp.setHgap(5d);
        gp.setVgap(10d);
    
        gp.setPadding(new Insets(20));

        Scene scene = new Scene(new StackPane(gp));
    
        stage.setScene(scene);

        stage.show();
    }

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

}

Output:

GridPane