Usage of ApplicationResource

Hello,

I wrote a simple application, it should only display an image.
I my Application I uses the following code

label.setIcon( new ClassResource( "find.png", this ) );

My find.png is located in the the package as the Application class.
After running the application no Image will be displayed, in the logs I found
INFO: Requested resource [VAADIN/APP/1/find.png] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.
Whats wrong ?
After I added

@Override
    public String getRelativeLocation( final ApplicationResource resource) {

		try {
			Field field = Application.class.getDeclaredField("resourceKeyMap");
			field.setAccessible(true);
			Map<Application,String> map = (Map<Application, String>) field.get( this );
	    	String key = map.get(resource);
	    	if( key != null ) {
	    		return  "app://APP/" + 1 + "/x";
	    	}
		} catch (Exception e) {
			e.printStackTrace();
		}
    	
		return super.getRelativeLocation(resource);
    }

I my Application everythings works as expected.

I'm not sure whats wrong, do I used the api wrong ?

Best regards,
André

EDIT --- Ignore my previous comments, I was mixing up concepts.

Upon closer investigation, it seems that the issue is somehow related to how your application is deployed, though I can't tell exactly what is going on there...