TextArea未在JavaFX中更新

Question

I'm defining the TextArea in my controller class like this:

@FXML 
private TextArea txtAreaStatus;

And I'm trying to append text to the TextArea using this code:

@FXML
public void clickGo (ActionEvent event) {

    txtAreaStatus = new TextArea("");

    txtAreaStatus.appendText("data");

    System.out.println("clicked");
}

I'm really confused as to why my text area is not updating. No errors whatsoever.

When I click the button, clicked gets printed on the screen.

What am I doing wrong?

Answer 1

Whenever you are using FXML and Controller combination, controls references are annotated with @FXML in the controller. The objects are injected into their respective references when the fxml is loaded. Therefore you don't need to do define a new object for them.

In your code you need to remove :

txtAreaStatus = new TextArea("");

because this makes you loose the reference to the object of TextField on the scene and defines a new Textfield object (which is not on the scene). You are later trying to do operations on this new object.