如何在JavaFX Button上设置工具提示？

Question

当我用鼠标悬停按钮时，如何设置按钮上方显示的标题或文字？

Answer 1

The Tooltip class is what you are looking for.

Example for a simple Tooltip

Button button = new Button("Hover Me");
button.setTooltip(new Tooltip("Tooltip for Button"));

You can also customize your Tooltip s: CSS Reference for Tooltip .

Example for a styled Tooltip

Button button = new Button();
button.setText("Hover Me!");
Tooltip tt = new Tooltip();
tt.setText("Text on Hover");
tt.setStyle("-fx-font: normal bold 4 Langdon; "
    + "-fx-base: #AE3522; "
    + "-fx-text-fill: orange;");

button.setTooltip(tt);

Answer 2

To add a tooltip in FXML, you could also do this,

<Button>
 <tooltip><Tooltip text="my tooltip" /></tooltip>
</Button>

Answer 3

If you are using Scenebuilder, you can add tooltips by locating "Tooltip" under the Miscellaneous dropdown (Left panel) and dragging it to the node you want to install the tooltip. You can then specify various properties (Right panel) of the tooltip like style and text just as you would a normal Node.