Why Does getClass().getResource() Fail to Load My Image?

Loading Resources Using getClass().getResource()

In your attempt to load an image for an application icon, you encountered difficulties using getClass().getResource(). This method loads resources from the classpath, not a filesystem path.

In your first example, you accessed the image via a URL using getClass().getResource. This method searches the classpath for the specified resource. When the image was not found at the provided classpath location, imgURL returned null.

In contrast, creating the ImageIcon directly by passing in the file path as a string successfully loaded the image because it reads from the filesystem. In this case, the path refers directly to the image file.

To address this issue, ensure that the image file is accessible via the classpath. This typically involves placing the image in a subdirectory within the project directory. For example, if you create a subdirectory named "images" and place the image file within it, you can access the image using the following resource path:

java.net.URL imgURL = getClass().getResource("/images/my_image.png");

Please note that the leading slash '/' in the resource path indicates that the image is located at the root of the classpath, which is the top-level directory of the project.

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