Problem with netbeans IDE

hey! i am a learner of j2se 5.0 and am horrible at command line compiling. so i use netbeans IDE and well it has been doing excellently till now.
recently i had a porblem with ImageIcons and i found the exact problem which i was having but with repect to applets , that is, the images were not displaying properly. i have managed to solve the problem as far as applets are concerned, but it is not so with applications.
the thing is when i use the run function of the IDE, it displays all icons perfectly and its as if nothing is wrong.
it creates a .jar file which when i separately click to execute by going to its folder, does so but does not display any images. In fact it executes and behaves in such a way that it's exactly as if i have not used icons in the program- it displays everything else. should i change some setting of the IDE? but if some setting is to be changed, y is it running normally when run from the IDE( F6 key).
also when i used the command line (after some research to learn to use it) to extract all files from the .jar file, all the images were in it!!!as well as all the class files. so i can't even say that the IDE has not bundled up the images into the .jar file.
could some1 please help??i need help with .jar files and not applets.

first i deefined a method as shown in the Java tutorial
ImageIcon icon =createImageIcon("lion.jpg","name");
( within the contructor of the class)
then after completing the constructor for the class- (I am trying to display an ImageIcon on the background of a JFrame)
i provided the following definition after the constructor and b4 the main method:
protected static ImageIcon createImageIcon(String path,
String description) {
java.net.URL imgURL = LabelDemo.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL, description);
} else {
System.err.println("Couldn't find file: " + path);
return null;
this is what i did-and when run from the IDE-it is perfect, but the jar file ggenerated when executed displays every single thing-all swing components e.t.c EXCEPT the image
the image is in the same folder as the source file- i checked because if not, an error is indicated- so that is not the problem here.
this same exact code works perfectly with applets and they execute perfectly both from the IDE and also when executed separately.
the same problem also iccurs when trying to display on labels and buttons.(only for JFrames not for JApplets)
the thing is in the java tutorial the method is given for applets and so my applets worked -so is there somethin i'm missing for frames- as far as i know they r very similar as far as usage is concerned.

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