I tried to implement custom label formatter and it seems not to work.


import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Slider;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;
import javafx.util.StringConverter;

public class Main extends Application{
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        Pane pane = new Pane();
        pane.setPrefHeight(200);
        pane.setPrefWidth(200);

        Slider slider = new Slider();
        slider.setShowTickLabels(true);
        slider.setShowTickMarks(true);
        
        slider.setLabelFormatter(new CustomConverter());
        pane.getChildren().add(slider);

        Scene scene = new Scene(pane, 400, 400);
        stage.setScene(scene);
        stage.show();
    }

    class CustomConverter extends StringConverter<java.lang.Double> {
        @Override
        public String toString(Double t) {
            return "Ok.";
        }

        @Override
        public Double fromString(String string) {
            return 10.0;
        }
    }
}