Question

我现在花了一些时间试图弄清楚我的逻辑在哪里有缺陷，并且在这里看到了类似的问题，但由于某种原因我不断得到nullPointerException：

public class MainWindowController
    implements Initializable {


    public static final String SCHEDULE_MANAGER = "ScheduleManagerController";
    public static final URL SCHEDULE_MANAGER_FXML = ScheduleManagerController.class.getResource("ScheduleManager.fxml");
    final SwitchableStackPane customStackPane = new SwitchableStackPane();

    @FXML 
    Button btnScheduleManager; // Value injected by FXMLLoader
    BorderPane switchablePane; //Value injected by FXMLLoader


    @Override // This method is called by the FXMLLoader when initialization is complete
    public void initialize(URL fxmlFileLocation, ResourceBundle resources) {
        assert btnScheduleManager != null : "fx:id=\"ScheduleManager\" was not injected: check your FXML file 'HOECTool.fxml'.";
        assert switchablePane != null : "fx:id=\"mainPane\" was not injected: check your FXML file 'HOECTool.fxml'.";


            customStackPane.loadScreen(SCHEDULE_MANAGER, SCHEDULE_MANAGER_FXML);

            switchablePane.setCenter(customStackPane);

    }

抛出nullPointer异常： switchablePane.setCenter（customStackPane）;

Answer 1

排序，我是个白痴。这样做了：

 @FXML 
    Button btnScheduleManager; // Value injected by FXMLLoader
@FXML
    BorderPane switchablePane; //Value injected by FXMLLoader

在FXML中创建的JavaFX中设置BorderPane的中心窗格（nullPointerException）

1 个答案: