问JavaFX如何实现动态添加组件？

    //点击添加时间
    @FXML
    void addtimecustom(MouseEvent event) {
        //理论上来说，下面这种方式应该也是可以的，但是不知道为什么就是出不来效果
        //AnchorPane time1 = new AnchorPane(timecustom);
        //timebox.getChildren().add(time1);

        HBox timeall = new HBox();

        TextField time = new TextField();
        time.setPrefHeight(6.0);
        time.setPrefWidth(40.0);
        time.setLayoutY(2.0);
        timeall.getChildren().add(time);

        Label time1 = new Label("  : ");
        time1.setLayoutX(53.0);
        time1.setLayoutY(-2.0);
        time1.prefHeight(28.0);
        time1.setPrefWidth(19.0);
        timeall.getChildren().add(time1);

        TextField time2 = new TextField();
        time2.setPrefHeight(6.0);
        time2.setPrefWidth(40.0);
        time2.setLayoutY(2.0);
        timeall.getChildren().add(time2);

        timebox.setSpacing(10.0);
        timebox.getChildren().add(timeall);
    }