线程“ JavaFX应用程序线程”中的异常java.lang.RuntimeException：java.lang.reflect.InvocationTargetException JavaFX FXML

Question

我有几个带有相应控制文件的fxml文件。除了一个以外，它们都起作用。那个曾经工作。这是错误日志。

Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at com.mycompany.kioskapp2.App.loadFXML(App.java:34)
    at com.mycompany.kioskapp2.App.setRoot(App.java:29)
    at com.mycompany.kioskapp2.PrimaryController.BrowseItemsButtonAction(PrimaryController.java:24)

App.java

public class App extends Application {

    private static Scene scene;
    public static String Username, Password;

    @Override
    public void start(Stage stage) throws IOException {
        scene = new Scene(loadFXML("primary"), 800, 700);
        stage.setTitle("Grogan Vending");
        stage.setScene(scene);
        stage.show();
    }

    static void setRoot(String fxml) throws IOException {
        System.out.println("in setRoot");
        scene.setRoot(loadFXML(fxml));
    }

    private static Parent loadFXML(String fxml) throws IOException {
        FXMLLoader fxmlLoader = new FXMLLoader(App.class.getResource(fxml + ".fxml"));
        return fxmlLoader.load();
    }

    @SuppressWarnings("empty-statement")
    public static void VerifyUsername(String user, String passwd) throws IOException {
        System.out.println("in App.VerifyUsername");
        Boolean bool1 = false;
        Boolean bool2 = false;
        Boolean found1 = false;
        Boolean found2 = false;
        String savestr = null;
        try {
            try (FileReader reader = new FileReader("C:\\Users\\Skibum.DESKTOP-DBDQH1D\\Documents\\NetBeansProjects\\KioskApp2\\src\\main\\resources\\com\\mycompany\\kioskapp2\\LoginFile.txt")) {
                BufferedReader bufferedReader = new BufferedReader(reader);

                String dbline;

                while ((dbline = bufferedReader.readLine()) != null) {
                    bool1 = dbline.contains(user);
                    if (bool1 == true) {
                        found1 = true;
                        found2 = dbline.contains(passwd);
                        savestr = dbline;
                    }
                }
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
        if (found2 == false) {
            App.setRoot("passwderr");
        }
        if (found1 == false) {
            try {
                App.setRoot("usernameerr");
            } catch (IOException ex) {
                Logger.getLogger(App.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        if (found1 == true && found2 == true) {
            String result[] = savestr.split(",");
            for (String temp: result){

            }
            System.out.println(result[2]);
            App.setRoot("primary");
        }
    }

    public static void main(String[] args) {
        launch(args);
    }
}

PrimaryController.java

public class PrimaryController {

    @FXML private Text actiontarget;

    @FXML private void LoginButtonAction() throws IOException {
        App.setRoot("login");
        System.out.println("Login button pressed");
    }

    @FXML private void NewAccountButtonAction() throws IOException {
        App.setRoot("newaccount");
        System.out.println("New Account button pressed");
    }

    @FXML private void BrowseItemsButtonAction() throws IOException {
        App.setRoot("browse");
        System.out.println("Browse Items button pressed");
    }

    @FXML private void ExpenseAcctButtonAction()throws IOException {
        App.setRoot("expenseacct");
        System.out.println("expense acct button pressed");
    }

    @FXML private void HelpButtonAction()throws IOException {
        App.setRoot("help");
        System.out.println("Help button pressed");
    }

    @FXML private void SuggestButtonAction()throws IOException {
        App.setRoot("suggestions");
        System.out.println("Suggestions button pressed");
    }

}

Answer 1

您缺少事件类型是函数的参数

BrowseItemsButtonAction() 

应该是

BrowseItemsButtonAction(MouseEvent event)