public class Main extends Application {
    private FlowPane pane;
    private Scene scene;
    private Stage stage;
    private Label label;
    public void start(Stage stage) {

        Slider slider = new Slider();
        slider.setMin(1);
        slider.setMax(9);
        slider.setValue(3);
        slider.setShowTickLabels(true);
        slider.setBlockIncrement(1);

        Spinner <Integer>  spinner = new Spinner <Integer> ();
        final int initialValue= 3;
        SpinnerValueFactory<Integer> valueFactory = new SpinnerValueFactory.IntegerSpinnerValueFactory(1,9,initialValue );
        spinner.setValueFactory(valueFactory);


        this.stage = stage;
        pane = new FlowPane();
        pane.getChildren().addAll(spinner, slider);
        scene = new Scene(pane , 350 , 150);
        stage.setScene(scene);
        stage.show();


    }

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

Spinner<Double> spinner = new Spinner<>();
final double initialValue = 3D;
SpinnerValueFactory<Double> valueFactory = new SpinnerValueFactory.DoubleSpinnerValueFactory( 1D, 9D, initialValue, 1D );
spinner.setValueFactory( valueFactory );

valueFactory.valueProperty().bindBidirectional( slider.valueProperty().asObject() );

valueFactory.setConverter( new StringConverter<Double>() {
    private final DecimalFormat df = new DecimalFormat("#");
    @Override
    public String toString( Double value ) {
        if ( value == null )
            return "";
        return df.format( value );
    }
    @Override
    public Double fromString( String value ) {
        try {
            if ( value == null )
                return null;
            value = value.trim();
            if ( value.length() < 1 )
                return null;
            return df.parse(value).doubleValue();
        } catch ( ParseException ex ) {
            throw new RuntimeException( ex );
        }
    }
});

public class Main extends Application {
private FlowPane pane;
private Scene scene;
private Stage stage;
private Label label;
public void start(Stage stage) {

    Slider slider = new Slider();
    slider.setMin(1);
    slider.setMax(9);
    slider.setValue(3);
    slider.setShowTickLabels(true);
    slider.setBlockIncrement(1);

   Spinner<Double> spinner = new Spinner<>();
    final double initialValue = 3D;
    SpinnerValueFactory<Double> valueFactory = new
    SpinnerValueFactory.DoubleSpinnerValueFactory( 1D, 9D, initialValue, 1D );
   spinner.setValueFactory( valueFactory );

   valueFactory.valueProperty().bindBidirectional(
   slider.valueProperty().asObject() );

   valueFactory.setConverter( new StringConverter<Double>() {
 private final DecimalFormat df = new DecimalFormat("#");
@Override
public String toString( Double value ) {
    if ( value == null )
        return "";
    return df.format( value );
}
@Override
public Double fromString( String value ) {
    try {
        if ( value == null )
            return null;
        value = value.trim();
        if ( value.length() < 1 )
            return null;
        return df.parse(value).doubleValue();
    } catch ( ParseException ex ) {
        throw new RuntimeException( ex );
    }
}
});

    this.stage = stage;
    pane = new FlowPane();
    pane.getChildren().addAll(spinner, slider);
    scene = new Scene(pane , 350 , 150);
    stage.setScene(scene);
    stage.show();


}

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