авторpublic class ChartWindow extends Application {
List<Object[]> data;


@Override
public void start(Stage stage) throws Exception {
stage.setTitle("Данные в разрезе: день");

final CategoryAxis xAxis = new CategoryAxis();
final NumberAxis yAxis = new NumberAxis();
yAxis.setTickUnit(1.0);
xAxis.setLabel("Дата");
yAxis.setLabel("шт");
yAxis.setTickUnit(1);


final LineChart<String, Number> lineChart = new LineChart<>(xAxis, yAxis);

lineChart.setTitle("Данные за период");
lineChart.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);

//defining a series
XYChart.Series<String, Number> series = new XYChart.Series<>();
series.setName("Инциденты");
addData(series, new Object[]{"1" ,21});
addData(series, new Object[]{"2" ,1});
addData(series, new Object[]{"3" ,3});
addData(series, new Object[]{"4" ,43});
addData(series, new Object[]{"5" ,13});
addData(series, new Object[]{"6" ,6});

//defining a series
XYChart.Series<String, Number> series2 = new XYChart.Series<>();
series2.setName("Инциденты2");
addData(series2, new Object[]{"1" ,12});
addData(series2, new Object[]{"2" ,13});
addData(series2, new Object[]{"3" ,34});
addData(series2, new Object[]{"4" ,43});
addData(series2, new Object[]{"5" ,1});
addData(series2, new Object[]{"6" ,10});

lineChart.getData().add(series);
lineChart.getData().add(series2);

Scene scene = new Scene(lineChart, 800, 600);
stage.setScene(scene);
stage.show();
}

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

private static void addData(XYChart.Series<String, Number> series, Object[] objects) {
final XYChart.Data<String, Number> data = new XYChart.Data<>((String) objects[0], (Number) objects[1]);
series.getData().add(data);
data.nodeProperty().addListener(new ChangeListener<Node>() {
@Override
public void changed(ObservableValue<? extends Node> observableValue, Node node, Node node2) {
Tooltip t = new Tooltip("y: " + data.getYValue().toString() + "; x: " + data.getXValue());
Tooltip.install(node2, t);
data.nodeProperty().removeListener(this);

}
});
}
}