JavaFX pass values from child to parent

Question

I have one parent controller which contain one button. When I click on button it open new window and show some data into table. The code I have used for opening window is

Answer 1

In my example below, the account window (child/dialog) passes the newly selected account name back to the parent window when the save button is clicked. On the parent window ...

Stage nstage = new Stage();
                FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("Accounts.fxml"));
                Parent root = (Parent) fxmlLoader.load();
                AccountsController accController = fxmlLoader.getController();
                accController.dialogMode(); //Call a function in acconunt windoow to preset some fields

                Scene scene = new Scene(root);
                nstage.setTitle("Create Company Account");
                nstage.setScene(scene);

                Stage stage  = (Stage) src.getScene().getWindow();
                nstage.initOwner(stage);
                nstage.initModality(Modality.APPLICATION_MODAL);
                //nstage.initStyle(StageStyle.UNDECORATED); 
                nstage.show();

                nstage.setOnCloseRequest(new EventHandler(){
                    public void handle(WindowEvent we) {
                            txtCompany.setText( accController.lbl1.getText() );
                    }

                });