**Java FX** I am looking for someone who is familiar with javaFX and I need help understanding it.

[mortal helm]

How do i change this code into using listeners instead of binders?

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class PropertyBindingDemo extends Application
{
    //--------------------------------------------------------------------
    //  Displays the width and height of the scene, as well as a circle
    //  in the center of the scene. The scene is updated using property
    //  bindings as the window is resized.
    //--------------------------------------------------------------------
    public void start(Stage primaryStage)
    {
        Group root = new Group();
        Scene scene = new Scene(root, 300, 200, Color.SKYBLUE);
        Circle center = new Circle(6);
        center.centerXProperty().bind(scene.widthProperty().divide(2));
        center.centerYProperty().bind(scene.heightProperty().divide(2));

        StringProperty width = new SimpleStringProperty("Width: ");
        StringProperty height = new SimpleStringProperty("Height: ");

        Text widthText = new Text(20, 30, "");
        widthText.textProperty().bind(width.concat(scene.widthProperty()));

        Text heightText = new Text(20, 60, "");
        heightText.textProperty().bind(height.concat(scene.heightProperty()));
        root.getChildren().addAll(center, widthText, heightText);

        primaryStage.setTitle("Property Binding Demo");
        primaryStage.setScene(scene);
        primaryStage.show();
    }
    public static void main(String[] args)
    {
        launch(args);
    }
}```