JavaFX Slider handle change event

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.geometry.Orientation;
import javafx.scene.Scene;
import javafx.scene.control.Slider;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.text.Text;

public class Main extends Application {
  @Override//from w w  w  . j  ava2 s.c om
  public void start(Stage primaryStage) {
    Text text = new Text(20, 20, "JavaFX Programming");
    
    Slider slHorizontal = new Slider();
    slHorizontal.setShowTickLabels(true);
    slHorizontal.setShowTickMarks(true);    
    
    Slider slVertical = new Slider();
    slVertical.setOrientation(Orientation.VERTICAL);
    slVertical.setShowTickLabels(true);
    slVertical.setShowTickMarks(true);
    slVertical.setValue(100);
    
    // Create a text in a pane
    Pane paneForText = new Pane();
    paneForText.getChildren().add(text);
    
    // Create a border pane to hold text and scroll bars
    BorderPane pane = new BorderPane();
    pane.setCenter(paneForText);
    pane.setBottom(slHorizontal);
    pane.setRight(slVertical);

    slHorizontal.valueProperty().addListener(ov -> 
      text.setX(slHorizontal.getValue() * paneForText.getWidth() /
        slHorizontal.getMax()));
    
    slVertical.valueProperty().addListener(ov -> 
      text.setY((slVertical.getMax() - slVertical.getValue()) 
        * paneForText.getHeight() / slVertical.getMax()));
    

    Scene scene = new Scene(pane, 450, 170);
    primaryStage.setTitle("SliderDemo");
    primaryStage.setScene(scene);
    primaryStage.show();   
  }


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