Question

我试图让我的项目成为一个可运行的jar但问题是gui没有出现。从我的cmd中的错误我告诉它是关于我的图像视图。

我的项目包含的图像视图位于除sourcefoler之外的其他文件夹中。我已经设置了构建路径，但它似乎仍然无法正常工作

这是我将图像添加到GUI的地方：

String path = "./imageTest/";
        File folder = new File(path);
        File[] listOfFiles = folder.listFiles();
        for (File file : listOfFiles) { <----- Line 51
            ImageView imageView;
            imageView = createImageView(file);
            tile.getChildren().addAll(imageView);
        }

文件夹imageTest被添加为构建路径中的源文件夹

这是我通过cmd运行jar时遇到的错误：

"Exception in Application start method
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
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$155(LauncherImpl.java:182)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
        at application.guifx.MainScreen.mainScene(MainScreen.java:51)
        at application.guifx.MainApp.start(MainApp.java:37)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
        at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
        at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
        at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
        ... 1 more"

这是MainApp

public class MainApp extends Application {
    private Service service;
    private Stage stage;
    private ScrollPane root = new ScrollPane();

    private MainScreen mainScreen; 

    public MainApp() {
        service = Service.getService();
        StorageInitializer.initStorage();

    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        service = Service.getService();

        stage = primaryStage;

        mainScreen = new MainScreen(stage);

        stage.setWidth(100);
        stage.setHeight(100);

        primaryStage.setWidth(1000);
        primaryStage.setHeight(850);

        Scene scene = mainScreen.mainScene();<----- Line 37

        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

    }

}

要清楚......程序在通过日食进行的时候会起作用，但是当我把它变成一个可运行的jar时它就没有了这是从eclipse打开它时系统的外观 Link

Answer 1

您的变量html code为空。请参阅：https://docs.oracle.com/javase/8/docs/api/java/io/File.html#listFiles--

如果此抽象路径名不表示目录，则返回null，或者如果发生I / O错误。

检查变量handleClick(){ this.setState({fadeAway} => ({ fadeAway: ! fadeAway )}; } ... <Child text={obj} key={index} onClick={() => this.handleClick} className={this.state.fadeAway? 'class1' : 'class2'}/>是否已使用现有目录初始化。
检查您的可执行文件是否有权读取该目录。
检查目录是否包含文件

带有imageview的Java Runnable jar不会显示GUI

1 个答案: