Application start方法中的JavaFX异常（java.lang.IllegalStateException：未设置位置。）

Question

我尝试移动我的fxml文件，但我似乎无法找到正确的文件路径。我的控制器也必须与我的fmxl文件在同一个包中。我在线阅读我应该把我的fxml文件放到资源文件夹中，这就是我所做的，但它还没有用。如果我将它移动到资源文件夹，我的控制器在UI文件夹中？

public class Main extends Application{

    public Main() {

    }
    private static ArgumentParser argumentParser;
    private static Stage primaryStage;
    private static ArgumentResponder argumentResponder;
    private static UncaughtExceptionLogger uncaughtExceptionLogger;
    private static Settings settings;
    /**
     * The main method, for starting the application.
     *
     * <p>See {@link Argument} for the supported arguments.</p>
     *
     * @param args arguments given when starting KouChat.
     */
    public static void main(String[] args){

        argumentParser = new ArgumentParser(args);
        argumentResponder = new ArgumentResponder(argumentParser);

        if (!argumentResponder.respond()) {
            return;
        }

        new LogInitializer(argumentParser.hasArgument(Argument.DEBUG));
        // Initialize as early as possible to catch all exceptions
         uncaughtExceptionLogger = new UncaughtExceptionLogger();

         settings = loadSettings(argumentParser);

        launch(args);
    }
    private static Settings loadSettings(final ArgumentParser argumentParser) {
        final Settings settings = new Settings();

        final ArgumentSettingsLoader argumentSettingsLoader = new ArgumentSettingsLoader();
        argumentSettingsLoader.loadSettings(argumentParser, settings);

        final PropertyFileSettingsLoader propertyFileSettingsLoader = new PropertyFileSettingsLoader();
        propertyFileSettingsLoader.loadSettings(settings);

        return settings;
    }
    @Override
    public void start(Stage primaryStageObj) throws Exception{
        primaryStage = primaryStageObj;
        System.out.println(getClass().getResource("Chat.fxml"));
        FXMLLoader loader = new FXMLLoader(getClass().getResource("Chat.fxml"));
        ChatController pls = new ChatController(argumentParser, settings, uncaughtExceptionLogger);
        loader.setController(pls);
        pls.setStage(primaryStage);
        Parent root = loader.load();
        primaryStage.setTitle("Flake");
        primaryStage.setScene(new Scene(root, 959,583  ));
        primaryStage.setResizable(false);
        primaryStage.show();
        primaryStage.setResizable(false);
        primaryStage.setOnCloseRequest(e -> Platform.exit());


    }
}

这是我帮助查看我出错的项目路径

运行我的代码时收到的错误消息。

Exception in Application start method
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
    at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalStateException: Location is not set.
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2434)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
    at net.usikkert.kouchat.Main.start(Main.java:71)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
    ... 1 more
Exception running application net.usikkert.kouchat.Main