Customized JavaFx DatePicker. Set the start year of the datepicker

BirthdayDatePicker.java

DatePicker birthdayDatePicker = new DatePicker() {

            @Override
            protected Skin<?> createDefaultSkin() {
                final DatePickerSkin skin = new DatePickerSkin(
                        birthdayDatePicker) {

                            @Override
                            public Node getPopupContent() {
                                final DatePickerContent popupContent
                                = (DatePickerContent) super.getPopupContent();
                                popupContent.goToDate(LocalDate.now()
                                        .minusYears(
                                                20), true);
                                return popupContent;
                            }

                        };
                DatePickerContent content = (DatePickerContent) skin
                        .getPopupContent();
                content.goToDate(LocalDate.now().minusYears(18L), true);
                return skin;
            }

        };