Writing output from within a business logic object to a NetBeans/JavaFX TextArea

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new to java, javaFX(-8) and NetBeans. Quite some programming experiance, but way back when C and C++ were all the rage. So little experience with graphical GUI.

Trying to get some feedback (info, error, progress) back to the user (me) from within the inner workings of a complex object (written by me :-)). Want to use javaFX TextArea for that, does not even compile? And I do not get why... Simplified code added.

Any help to get this working much appreciated.

P.S. I realise there may be other approaches to this, and i am willing to look into those, but I would like to get this running, if at all possible, for learning purposes.

public class TestWriteToText extends Application { /* as generated */

@Override
public void start(Stage stage) throws Exception {
    Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));

    Scene scene = new Scene(root);

    stage.setScene(scene);
    stage.show();
}

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    launch(args);
}

}

public class FXMLDocumentController implements Initializable {

@FXML
private TextArea txtArea;
@FXML
private Button localButton;
@FXML
private Button logicButton;

/**
 * Initializes the controller class.
 */
@Override
public void initialize(URL url, ResourceBundle rb) {
    // TODO
}    


@FXML
private void doLocalButton(ActionEvent event) {
    writeOutput (String.format("It works locally %n"));
}

@FXML
private void doLogicButton(ActionEvent event) {
    BusinessObject myLogic = new BusinessObject();      

}

public void writeOutput (String outputLine){
    txtArea.appendText(outputLine);
}

}

public class BusinessObject {

public BusinessObject (){
    String outputLine;
    outputLine = String.format("How to make this work from business logic???%n");               
    FXMLDocumentController.writeOutput(outputLine);
}

}

asked 26 secs ago

LJS

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Writing output from within a business logic object to a NetBeans/JavaFX TextArea