uni/inf1010/lec-04-07/GUIController.java

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.text.Text;

public class GUIController {
	@FXML Text actiontarget;

	@FXML protected void handleSubmitButton(ActionEvent event) {
		actiontarget.setText(actiontarget.getText()+" yay");
	}
}