JavaFX FXML控制器-構造函數VS初始化方法我的Application類如下所示：public class Test extends Application {
private static Logger logger = LogManager.getRootLogger();
@Override
public void start(Stage primaryStage) throws Exception {
String resourcePath = "/resources/fxml/MainView.fxml";
URL location = getClass().getResource(resourcePath);
FXMLLoader fxmlLoader = new FXMLLoader(location);
Scene scene = new Scene(fxmlLoader.load(), 500, 500);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}}這個FXMLLoader創建相應控制器的實例(在FXML文件通過fx:controller)首先調用默認構造函數，然后調用initialize方法：public class MainViewController {
public MainViewController() {
System.out.println("first");
}
@FXML
public void initialize() {
System.out.println("second");
}}產出如下：first
second那么，為什么initialize方法存在嗎？使用構造函數與initialize方法來初始化控制器所需的東西？謝謝你的建議！
3 回答
翻翻過去那場雪
TA貢獻2065條經驗 獲得超14個贊
initialize@FXML
class MyController {
@FXML
TableView<MyModel> tableView;
public MyController() {
tableView.getItems().addAll(getDataFromSource()); // results in NullPointerException, as tableView is null at this point.
}
@FXML
public void initialize() {
tableView.getItems().addAll(getDataFromSource()); // Perfectly Ok here, as FXMLLoader already populated all @FXML annotated members.
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