我是JavaFX和Scene Builder的新手。我构建了一个Java程序来注册车辆及其加油。在我的主班我有这个：
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("main.fxml"));
primaryStage.setTitle("Controle de Abastecimentos");
primaryStage.setScene(new Scene(root, 700, 400));
primaryStage.show();
Cadastro cadastro = new Cadastro();
cadastro.novoVeiculo("AAA-1555", "Volkswagen", "Polo", 2018, 55);
cadastro.novoVeiculo("BAC-2555", "Fiat", "Palio", 2012, 40);
cadastro.novoVeiculo("AAD-4555", "Mitsubishi", "Outlander", 2013, 65);
cadastro.novoVeiculo("DAA-1555", "Kia", "Soul", 2011, 50);
cadastro.novoVeiculo("ADA-0555", "Porsche", "Cayenne", 2015, 70);
cadastro.veiculos.get("AAA-1555").addAbastecimento("Comum", "01/05/2018", 0, 50, new BigDecimal("4.29"));
cadastro.veiculos.get("AAA-1555").addAbastecimento("Comum", "05/05/2018", 300, 50, new BigDecimal("4.45"));
cadastro.veiculos.get("AAA-1555").addAbastecimento("Comum", "15/05/2018", 750, 50, new BigDecimal("4.35"));
cadastro.veiculos.get("AAA-1555").addAbastecimento("Comum", "25/10/2018", 800, 20, new BigDecimal("4.29"));
}
public static void main(String[] args) throws IOException {
launch(args);
}
}
它基本上实例化一个Cadastro对象，该对象创建一个HashMap并将Veiculo存储在其中：
public class Cadastro {
public Map<String, Veiculo> veiculos = new HashMap<>();
public Cadastro() {}
public void novoVeiculo (String placa, String fabricante, String modelo, int ano, double capacidadeTanque) {
if (veiculos.containsKey(placa)) {
throw new IllegalArgumentException("Veículo já cadastrado");
}
veiculos.put(placa, new Veiculo(placa, fabricante, modelo, ano, capacidadeTanque));
}
}
我的问题是使用JavaFX和Scene Builder。在Main类的控制器中，我做了一个函数来调用TableView所在的Scene：
public class Controller {
public void loadPesquisarVeiculos(ActionEvent actionEvent) throws IOException {
Stage main = (Stage) ((Node)actionEvent.getSource()).getScene().getWindow();
Pane pesquisaVeiculo = FXMLLoader.load(getClass().getResource("carInformation.fxml"));
main.setScene(new Scene(pesquisaVeiculo));
}
}
因此，当我调用loadPesquisarVeiculos时，我的场景将变为具有新Controller的TableView所在的场景。
public class VeiculoTableController implements Initializable {
@FXML private TableView<Veiculo> tableView;
@FXML private TableColumn<Veiculo, String> placa;
@FXML private TableColumn<Veiculo, String> fabricante;
@FXML private TableColumn<Veiculo, String> modelo;
@FXML private TableColumn<Veiculo, Integer> ano;
@FXML private TableColumn<Veiculo, Double> capacidadeTanque;
@FXML private TableColumn<Veiculo, Double> odometro;
ObservableList<Veiculo> veiculos = FXCollections.observableArrayList();
@Override
public void initialize(URL location, ResourceBundle resources) {
placa.setCellValueFactory(new PropertyValueFactory<Veiculo, String>("placa"));
fabricante.setCellValueFactory(new PropertyValueFactory<Veiculo, String>("fabricante"));
modelo.setCellValueFactory(new PropertyValueFactory<Veiculo, String>("modelo"));
ano.setCellValueFactory(new PropertyValueFactory<Veiculo, Integer>("ano"));
capacidadeTanque.setCellValueFactory(new PropertyValueFactory<Veiculo, Double>("capacidadeTanque"));
odometro.setCellValueFactory(new PropertyValueFactory<Veiculo, Double>("odometro"));
tableView.setItems(veiculos);
}
}
我认为我必须将cadastro传递给ObservableList<Veiculo> veiculos = FXCollections.observableArrayList(I think I should put the cadastro HashMap here);，但是我不知道如何将cadastro传递给第一个控制器，然后传递给第二个控制器，因为使用Scene Builder他们没有构造函数，而是使用FXML文件。
任何帮助将不胜感激。我已经阅读了很多教程，但是它们都显示了如何创建TableView来实例化控制器类中的对象，这不是一个选择。