Java SE (Java Platform, Standard Edition)

Hi,
I am using JNLP to download jar on machine and make my swing application work offline on machine. Problem is that, I have swf file as resource included in Swing Panel (We use JFlash for flash support in swing).
But I get FileNotFoundException. because swf file resides in jar iteself.

code looks something like :

URL url=this.getClass().getResource("intro.swf");
fp=new FlashPanel(url);
	   fp.setMovie(url);

Does anybody have idea about this? Please tell me how to read any image/swf file which resides in JAR file..

Thanks in advance