问题

我正在尝试学习如何在JavaFX中显示图像。为了学习，我尝试创建了这个简单的程序。然而，图像不会显示在应用程序中。

```java
package imagedemo;

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.HBox;

public class ImageDemo extends Application
{    
    public static void main(String[] args)
    {
    launch(args);
    }
    
    @Override
    public void start(Stage primaryStage)
    {
        //创建图像和ImageView
        Image image = new Image("file:testImage.JPG");
        ImageView iv = new ImageView(image);
        
        //创建HBox、场景和舞台
        HBox hbox = new HBox(iv);
        Scene scene = new Scene(hbox);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

当我运行程序时，结果是：一个空的应用程序窗口。是否有任何解决方案可以使图像像应该出现在应用程序中一样？

编辑1：我正在使用NetBeans IDE 8.2进行这个程序，以防有人需要知道。

编辑2：这是文件testImage.JPG的完整路径：

<details>
<summary>英文:</summary>

I am trying to learn how to display images in JavaFX. In order to learn, I tried to create this simple program. However, the image does not display in the application. 

package imagedemo;

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.HBox;

public class ImageDemo extends Application
{
public static void main(String[] args)
{
launch(args);
}

@Override
public void start(Stage primaryStage)
{
    //Create Image and ImageView
    Image image = new Image("file:testImage.JPG");
    ImageView iv = new ImageView(image);
    
    //Create HBox, Scene, and Stage
    HBox hbox = new HBox(iv);
    Scene scene = new Scene(hbox);
    primaryStage.setScene(scene);
    primaryStage.show();
}

}

When I run the program, the result is: [an empty application window][1]. Are there any solutions that will cause the image to appear on the application as it should?

Edit 1: I am using NetBeans IDE 8.2 for this program in case anyone needs to know.

Edit 2: Here is the full path to file `testImage.JPG`: [![full path][2]][2]


  [1]: https://i.stack.imgur.com/wCNoD.jpg
  [2]: https://i.stack.imgur.com/GjUiD.png

</details>