question on ${controller.timerText}

Hey everyone,

When we have this code in our fxml file:

text="${controller.timerText}"

I believe we are binding the text of our fxml to that timerText in our controller file. However timerText doesn't exist in our controller file. There is mTimerText but that is a private field. Does it actually call the method below?:

public StringProperty timerTextProperty() {
        return mTimerText;
    }

or this one?

public String getTimerText() {
        return mTimerText.get();
    }

I believe one those two are being binded. However I cant seem to pinpoint which.

Also what was the reason we used StringProperty and SimpleStringProperty? In terms of, when would one use one and why?

Is it basically a string that has getters, setters, and that property method ^?

How come this is only in javaFX and not in normal java?

I feel that there is some sort of connect between StringProperty, binding in the fxml, and that property method^. If anyone could help clear up my confusion that would be great.

Thank you,

Kevin