How to add a scrollbar in JavaFX

I'm trying to add a scrollbar to H@R_869_2419 @Yes Scrollbar was added, but I didn't scroll How can I make it work?

public class ScrollableItems {

    public void scrollableItems(H@R_869_2419@ content) {

        double height = 180;

        ScrollBar sc = new ScrollBar();

        content.getChildren().add(sc);

        sc.setLayoutX(content.getWidth() - sc.getWidth());
        sc.setMin(0);
        sc.setOrientation(Orientation.VERTICAL);
        sc.setPrefHeight(height);
        sc.setMax(height * 2);

        sc.valueproperty().addListener(new changelistener<Number>() {
            public void changed(ObservableValue<? extends Number> ov,Number old_val,Number new_val) {
                content.setLayoutY(-new_val.doubleValue());
            }
        });
    }
}

Add children to H@R_869_2419 @Then pass it to the scrollableitems above（ H@R_869_2419 @Content) to add a scrollbar

public H@R_869_2419@ mainItemsWrapper() {
    H@R_869_2419@ scrollabelWrapper = new H@R_869_2419@();
    scrollabelWrapper.setMaxHeight(180);

    H@R_869_2419@ entityDetailViewWrapper = new H@R_869_2419@();

    entityDetailViewWrapper.getChildren().addAll(.....);

    scrollabelWrapper.getChildren().add(entityDetailViewWrapper);
    new ScrollableItems().scrollableItems(scrollabelWrapper);

    return scrollabelWrapper;
}

Thank you

Solution

I really don't understand why you want to reinvent the wheel You should use scrollpane instead of

This small example shows how to use the scrollpane class to create a scrollable H@R_869_2419 @：

@Override
public void start(Stage primaryStage) {

    H@R_869_2419@ h@R_869_2419@ = new H@R_869_2419@();

    Button b = new Button("add");
    b.setOnAction(ev -> h@R_869_2419@.getChildren().add(new Label("Test")));

    ScrollPane scrollPane = new ScrollPane(h@R_869_2419@);
    scrollPane.setFitToHeight(true);

    BorderPane root = new BorderPane(scrollPane);
    root.setPadding(new Insets(15));
    root.setTop(b);

    Scene scene = new Scene(root,400,400);
    primaryStage.setScene(scene);
    primaryStage.show();
}