I am using javafx along **with fxml**, so I use the **controller for the real coding**. I need to do a few operations on the stage, such as getting its x- or y-axis position. I have tried `stage.getX()` & `stage.getY`, but they don't work(the stage name is high-lited as the error). How do I use such functions in my controller? I tried doing this in my main file:

```
 public int locationX = stage.getX();

```

and   

```
public double locationX = stage.getX();

```

But it doesn't work, instead makes the whole program one big error.  

So how do I get to do such functions in my controller file? Do I need to import something or do something like above in another way?   

```
error: cannot find symbol
    locationX = stage.getX();
symbol:   variable stage
location: class FXMLController

```

I know that the "stage" is missing. But how to **get the "stage" in my controller?**