Closing a Stage from within its controller

Question

I need a way to close a Stage from within itself by clicking a Button.

I have a main class from which I create the main stage with a scene.

Answer 1

You can derive the stage to be closed from the event passed to the event handler.

new EventHandler() {
  @Override public void handle(ActionEvent actionEvent) {
    // take some action
    ...
    // close the dialog.
    Node  source = (Node)  actionEvent.getSource(); 
    Stage stage  = (Stage) source.getScene().getWindow();
    stage.close();
  }
}