Concatenate Javafx fx:Id

Question

I\'m kinda new to JavaFX and currently trying to do a Calendar application for a school project. I was wondering if there was a way to concatenate a fx:id

Answer 1

In addition to the methods mentioned by @jewelsea here are 2 more ways to do this:

1. Create & inject a Map containing the boxes as values from the fxml:

   Controller

   public class Controller {
   
       private Map boxes;
       @FXML
       private Spinner number;
       @FXML
       private Label box1;
       @FXML
       private Label box2;
   
       @FXML
       private void modify(ActionEvent event) {
           boxes.get("box"+number.getValue()).setText("42");
       }
   
   }
   

2. Pass the namespace of the FXMLLoader, which is a Map mapping fx:ids to the associated Objects, to the controller:

   Controller

   public class Controller implements NamespaceReceiver {
   
       private Map namespace;
       @FXML
       private Spinner number;
       @FXML
       private Label box1;
       @FXML
       private Label box2;
   
       @FXML
       private void modify(ActionEvent event) {
           ((Label)namespace.get("box" + number.getValue())).setText("42");
       }
   
       @Override
       public void setNamespace(Map namespace) {
           this.namespace = namespace;
       }
   }
   

   public interface NamespaceReceiver {
       public void setNamespace(Map namespace);
   }
   

   Code for loading the fxml:

   public static  T load(URL url) throws IOException {
       FXMLLoader loader = new FXMLLoader(url);
       T result = loader.load();
       Object controller = loader.getController();
       if (controller instanceof NamespaceReceiver) {
           ((NamespaceReceiver) controller).setNamespace(loader.getNamespace());
       }
       return result;
   }