JavaFX下拉按钮

MenuButton is a button which,when clicked or pressed,will show a
ContextMenu.

一个MenuButton有你提到的graphicProperty,因为它的基类是Labeled.

简单的例子

final Image image = new Image(getClass().getResource("cross_red.png").toExternalForm(),20,true,true);
MenuButton menuButton = new MenuButton("Don't touch this");
menuButton.setGraphic(new ImageView(image));
menuButton.getItems().addAll(new MenuItem("Really"),new MenuItem("Do not"));

这将生成一个按钮,如：

注意：如果您需要按钮也像真正的按钮一样,您可以从MenuButton切换到SplitMenuButton.唯一的区别是控制字段被分为按钮部分和下拉部分(因此您也可以分配操作为标题)：

The SplitMenuButton,like the MenuButton is closely associated with
the concept of selecting a MenuItem from a menu. Unlike MenuButton,
the SplitMenuButton is broken into two pieces,the “action” area and
the “menu open” area.

If the user clicks in the action area,the SplitMenuButton will act similarly to a Button,firing whatever is associated with the ButtonBase.onAction property.