@FXML
private BarChart<String, Integer> barChart;

@FXML
private CategoryAxis xAxis;

private ObservableList<String> dateA = FXCollections.observableArrayList();


@FXML
private void initialize() {
    // Get an array with the English month names.
    String[] months = DateFormatSymbols.getInstance(Locale.ENGLISH).getMonths();
    // Convert it to a list and add it to our ObservableList of months.
    dateA.addAll(Arrays.asList(months));
    // Assign the month names as categories for the horizontal axis.
    xAxis.setCategories(dateA);
}


/**
 *
 * @param entry
 */
public void setEntryData(List<Entry> entry) {
    int[] monthCounter = new int[12];
    for (Entry p : entry) {
      int month = p.getDateA();
        monthCounter[month]++;
    }

    XYChart.Series<String, Integer> series = new XYChart.Series<>();

    // Create a XYChart.Data object for each month. Add it to the series.
    for (int i = 0; i < monthCounter.length; i++) {
        series.getData().add(new XYChart.Data<>(dateA.get(i), monthCounter[i]));
    }

    barChart.getData().add(series);

}