JavaFX UI methods example

example.java

// Updating a JavaFX table when UI loads example
private void updateView() {
    col1.setCellValueFactory(new PropertyValueFactory<>("id"));
    col2.setCellValueFactory(new PropertyValueFactory<>("username"));
    col3.setCellValueFactory(new PropertyValueFactory<>("email"));
    col4.setCellValueFactory(new PropertyValueFactory<>("password"));
    table.setItems(FXCollections.observableArrayList(
            system.getUserRegistry()
    ));
}

// Adding a user on a JavaFX button click example
@FXML
protected void hanldeAddUser() {
  system.addUser(new User(
          Integer.parseInt(id.getText()),
          username.getText(),
          email.getText(),
          password.getText()
  ));
}