Sort ObservableList from high to low - javafx - javafx

Question

Is there any way to sort a ObservableList based on the values from high to low?
Say I have a
ObservableList<XYChart.Data> data;
containing a String and a Double. I want the list sorted based on the Double from highest to lowest values. The reason I want this is because charts look way better if their values are shown from the highest to the lowest.
I have something like this now:
sortedData = new SortedList<>(data);
sortedData.comparatorProperty().bind(mycomparatorProperty());

Answer 1

You can create a Comparator, compare by the Y value, and then reverse the order:
data.sort(Comparator.comparing(XYChart.Data<String,Double>::getYValue).reversed());
This will sort your collection as intented.
Or you can return a new collection:
List<XYChart.Data<String,Double>> sortedData =
data.stream()
.sorted(Comparator.comparing(XYChart.Data<String,Double>::getYValue).reversed())
.collect(Collectors.toList());
EDIT
For the sake of clarity, this is a full sample:
public class FXMain extends Application {
private final ObservableList<XYChart.Data<String,Double>> data =
FXCollections.observableArrayList(
new XYChart.Data("P1",200d),
new XYChart.Data("P2",150d),
new XYChart.Data("P3",250d));
#Override
public void start(Stage primaryStage) {
Button btn = new Button"Sort data!");
btn.setOnAction(e -> {
ObservableList<XYChart.Data<String,Double>> data2 =
data.stream()
.sorted(Comparator.
comparing(XYChart.Data<String,Double>::getYValue).reversed())
.peek(System.out::println)
.collect(Collectors.toCollection(()->FXCollections.observableArrayList()));
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}