JavaFX 8 How to set program icon to alert?

Question

How can I set program icon to alert without using alert.initOwner()? Why without initOwner? It\'s because some alert must be shown before whole win

Answer 1

public class AlertWithIcon
extends Application {
    @Override
    public void start(Stage stage) {
        Alert alert = new Alert(Alert.AlertType.CONFIRMATION,
            "Are you sure you want to delete this item?",
        ButtonType.YES, ButtonType.NO);    
       alert.setHeaderText("Delete Item"); 
   ((Stage)alert.getDialogPane().getScene().getWindow()).getIcons().add(new image("GenericApp.png"));
    alert.showAndWait();
}
}