How to edit fxml from code? - javafx

Question

So I have a BorderPane in my FXML, what I want to do is to reload my BorderPane.Center properties so it shows a different pane with different layout,
How can I achieve this? The codes below doesn't work for me.
p.s : sorry for indonesian.
My FXML :
<BorderPane fx:id="bPane" xmlns:fx="http://javafx.com/fxml" fx:controller="fx.HomeMhsController" stylesheets="#css.css">
<left>
<VBox spacing="10" fx:id="vbox" id="vbox" prefWidth="100" >
<Label id="Label" fx:id="biodata" text="Biodata" onMouseClicked="#showIdentity"/>
<Label id="Label" fx:id="histori" text="Histori Nilai" onMouseClicked="#showHistory" />
<Label id="Label" fx:id="jadwal" text="Jadwal Kuliah" onMouseClicked="#showSchedule" />
<Label id="Label" fx:id="pilih" text="Pilih Mata Kuliah" onMouseClicked="#chooseSchedule"/>
</VBox>
</left>
My Controller :
public class HomeMhsController{
#FXML private Label biodata2;
#FXML private BorderPane bPane;
#FXML private void showIdentity() throws SQLException{
init.initializeDB();
String query="select * from mahasiswa where nama_dpn ='" + MainController.username + "'";
ResultSet rset = init.stmt.executeQuery(query);
if(rset.next()){
String nim = rset.getString(1);
String nama_dpn = rset.getString(2);
String nama_blkg = rset.getString(3);
String tgl_lahir = rset.getString(4);
String tempat_lahir = rset.getString(5);
String jns_kelamin = rset.getString(6);
String agama = rset.getString(7);
String alamat = rset.getString(8);
String no_hp = rset.getString(9);
biodata2.setText(nim + nama_dpn + nama_blkg + tgl_lahir + tempat_lahir + jns_kelamin + agama + alamat + no_hp);
}
}
#FXML private void showHistory() throws IOException{
FXMLLoader loader = new FXMLLoader();
Parent rootNode = null;
rootNode = loader.load(getClass().getResource("homeMhs_fxml.fxml"));
Label dua = new Label("2");
Pane pane = new Pane();
pane.getChildren().add(dua);
((BorderPane) rootNode).setCenter(pane);
}
#FXML private void showSchedule() throws SQLException, IOException{
FXMLLoader loader = new FXMLLoader();
Parent rootNode = null;
rootNode = loader.load(getClass().getResource("homeMhs_fxml.fxml"));
Label tiga = new Label("3");
Pane pane = new Pane();
pane.getChildren().add(tiga);
((BorderPane) rootNode).setCenter(pane);
}
#FXML private void chooseSchedule() throws SQLException{
}

Answer 1

In the following code snippet:
#FXML private void showHistory() throws IOException{
FXMLLoader loader = new FXMLLoader();
Parent rootNode = null;
rootNode = loader.load(getClass().getResource("homeMhs_fxml.fxml"));
Label dua = new Label("2");
Pane pane = new Pane();
pane.getChildren().add(dua);
((BorderPane) rootNode).setCenter(pane);
}
you are loading the fxml file again, which is a new instance and different from the one you already have (since this method in its controller class). Moreover you are not doing anything with this newly loaded one (i.e. rootNode is not being added to any scene).
Instead just use the existing injected border pane:
#FXML private void showHistory() {
Label dua = new Label("2");
Pane pane = new Pane();
pane.getChildren().add(dua);
bPane.setCenter(pane);
}
or more shorter:
#FXML private void showHistory() {
bPane.setCenter(new Pane(new Label("2")));
}