New item is not updated in the TreeTableView from while getting data from DB?

New to javafx in learning stage.I am trying to Update the data from the database but when the call the getConnection method the list is updated but the Treeitem is not updated in the view.

On the first screen it shows the available Db's but after creating new the tree table view is not updating even after calling the getConnection();

marked the place where needed solution with "//-----------------Calling Here for Updation"

Tried

1.Used Refresh();

2.tried to clear the view;

PaneClass.java

public class PanesClass extends Application {
    ObservableList<Connections> cList = FXCollections.observableArrayList();
    DbConnection                dbConnection      = new DbConnection();
    TreeItem                    rootItem          = new TreeItem();
    TreeTableView               activeConnections = new TreeTableView();
    AnchorPane                  firstPane         = new AnchorPane();
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        NewConnection               newConnection     = new NewConnection();
        SplitPane                   root              = new SplitPane();
        AnchorPane                  secondPane        = new AnchorPane();
        HBox                        buttonBox         = new HBox();
        BorderPane                  topBar            = new BorderPane();
        Button                      nConnection       = new Button("+");
        buttonBox.getChildren().addAll(nConnection);
        topBar.setTop(buttonBox);

        TreeTableColumn<String, Connections> cNameColoumn = new TreeTableColumn<>("Name");

        cNameColoumn.setCellValueFactory(new TreeItemPropertyValueFactory<>("name"));

        TreeTableColumn<String, Connections> cStatusColoumn = new TreeTableColumn<>("Status");

        cStatusColoumn.setCellValueFactory(new TreeItemPropertyValueFactory<>("status"));

        activeConnections.getColumns().addAll(cNameColoumn, cStatusColoumn);
        activeConnections.setLayoutX(20);
        activeConnections.setLayoutY(40);

        firstPane.getChildren().addAll(topBar, activeConnections);
        root.getItems().addAll(firstPane, secondPane);

        Scene sc = new Scene(root, 600, 480);

        primaryStage.setScene(sc);
        primaryStage.show();
        activeConnections.setShowRoot(false);

         getconnection();

        nConnection.setOnAction(new EventHandler<ActionEvent>() {
                                    @Override
                                    public void handle(ActionEvent event) {
                                        try {
                                            newConnection.getConnection(activeConnections);
                                        } catch (ClassNotFoundException | SQLException e) {
                                            e.printStackTrace();
                                        }
                                    }
                                });
    }

    void getconnection() throws ClassNotFoundException, SQLException {
    rootItem.getChildren().clear();
    cList.clear();
    cList = dbConnection.getDatabase();
        for (Connections temp : cList) {
            rootItem.getChildren().add(new TreeItem<Connections>(temp));
            System.out.println(temp);
        }
        activeConnections.setRoot(rootItem);
        activeConnections.refresh();

    }
}

NewConnection.java

public class NewConnection {
    Connections                 connection = null;
    ObservableList<Connections> cList      = FXCollections.observableArrayList();
    PanesClass                  panesClass = new PanesClass();
    TreeItem<Connections>                    cItem      = null;
    TreeItem rootItem = new TreeItem();

    public void getConnection(TreeTableView<Connections> activeConnections) throws ClassNotFoundException, SQLException {
    DbConnection dbConnection=new DbConnection();
        Stage    secondaryStage = new Stage();
        VBox     root           = new VBox();
        GridPane cDetails       = new GridPane();
        HBox     actionButtons  = new HBox();
        Button   connect        = new Button("Connect");
        Button   save           = new Button("Save");
        Button   cancel         = new Button("Cancel");

        actionButtons.getChildren().addAll(connect, save, cancel);
        //cList=dbConnection.getDatabase();
        actionButtons.setSpacing(10);

        Label name = new Label("Username : ");

        cDetails.add(name, 0, 0);

        TextField uName = new TextField();

        cDetails.setHgrow(uName, Priority.ALWAYS);
        cDetails.add(uName, 1, 0);
        cDetails.setVgap(10);

        root.getChildren().addAll(cDetails, actionButtons);

        Scene sc = new Scene(root, 500, 200);
        secondaryStage.setScene(sc);
        secondaryStage.initModality(Modality.APPLICATION_MODAL);

        secondaryStage.show();
        save.setOnAction(new EventHandler<ActionEvent>() {
                             @Override
                             public void handle(ActionEvent event) {
                             try {

                    dbConnection.setNewDatabase(uName.getText());

   panesClass.getconnection();//-----------------*Calling Here for Updation*

         } catch (ClassNotFoundException | SQLException e) {
                    e.printStackTrace();
                }

                 secondaryStage.close();
                 event.consume();
         }              
      });
    }
}

Connections.java

public class Connections {
   private String name;
   private String password;
   private String url;
public Connections() {
    super();
}
public Connections(String name, String password, String url) {
    super();
    this.name = name;
    this.password = password;
    this.url = url;
}

public Connections(String name) {
    super();
    this.name = name;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}
public String getUrl() {
    return url;
}
public void setUrl(String url) {
    this.url = url;
}
@Override
public String toString() {
    return "Connections [name=" + name + ", password=" + password + ", url=" + url + "]";
}  
}