JavaFX - How to delete a specific Node from an AnchorPane

问题

I'm using SceneBuilder 8.0.0 and JavaFX 8.
I have a Button btn and a Label lbl attached to an AnchorPane ap.
When the application starts, btn and lbl are attached to ap.

How can i delete one of these nodes ? (i only know clear() method which deletes all the nodes from ap). thanks.

回答1:

In JavaFX, nodes can simply be removed from a Parent (e.g. an AnchorPane) using .getChildren() following by .remove(Object o)

Reference

So if you have a direct reference to these Nodes, you could use the following code to remove the Button from the AnchorPane:

ap.getChildren().remove(btn);

Lookup

If you, for some reason, don't have a reference to the Button btn you can use lookup(String selector) to find and remove it like so:

ap.getChildren().remove(ap.lookup('.button'));

FXML

Or finally, since you are using SceneBuilder (and thus fxml) you could also make sure you hava a Controller connected and assign an id to your Button to get ahold of a reference and remove it like so:

// ... somewhere in your class
@FXML
private Button myButtonId;

// ... somewhere in a method
ap.getChildren().remove(myButtonId);

来源：https://stackoverflow.com/questions/30018663/javafx-how-to-delete-a-specific-node-from-an-anchorpane