How to use

getIndex

method

in

com.jfoenix.controls.JFXListCell

new KeyFrame(Duration.millis(240),
  new KeyValue(this.translateYProperty(),
    -gap / 2 - (gap * (getIndex())),
    Interpolator.EASE_BOTH)
));

this.setTranslateY(-gap / 2 + (-gap * (getIndex())));
clip.setY(gap / 2);
clip.setHeight(getHeight() - gap);

((JFXListView<?>) getListView()).addSublist((JFXListView<?>) newNode, this.getIndex());
this.getStyleClass().add("sublist-item");

new KeyFrame(Duration.millis(240),
  new KeyValue(this.translateYProperty(),
    -gap / 2 - (gap * (getIndex())),
    Interpolator.EASE_BOTH)
));

this.setTranslateY(-gap / 2 + (-gap * (getIndex())));
clip.setY(gap / 2);
clip.setHeight(getHeight() - gap);

((JFXListView<?>) getListView()).addSublist((JFXListView<?>) newNode, this.getIndex());
this.getStyleClass().add("sublist-item");