How to make JavaFX Slider to move in discrete steps?

Question

I am making a GUI using JavaFx and I need sliders that only allow integers to ever be selected.

I know I can use snapToT

Answer 1

You can simply add a listener to the valueProperty of the Slider and then you can either set the integer value of the new Number value:

slider.valueProperty().addListener((obs, oldval, newVal) -> 
    slider.setValue(newVal.intValue()));

or alternatively you can use integer rounding using Math.round:

slider.valueProperty().addListener((obs, oldval, newVal) ->
    slider.setValue(Math.round(newVal.doubleValue())));