Icons disappear when creating a jar file.

I am trying to make a runable jar file of an application that i wrote however, when i export it from eclipse the icons no longer appear. All of the icons are contained in a class called gridGui. Any help would be great.
Thanks
     //Creates all of the icon files used for the buttons
     Icon fiftyCents = new ImageIcon("Fifty_Cents.gif");
     Icon oneDollar = new ImageIcon("One_Dollar2.gif");
     Icon twoDollar = new ImageIcon("Two_Dollar.gif");
     Icon threeDollar = new ImageIcon("Three_Dollar.gif");
     Icon fiveDollar = new ImageIcon("Five_Dollar.gif");
     Icon tenDollar = new ImageIcon("Ten_Dollar.gif");
     Icon freePlay = new ImageIcon("Free_Play.gif");
     Icon blank = new ImageIcon("Blank.gif");
     Icon unflipped = new ImageIcon("UnFlipped.gif");
     Icon oneDollarCoupon = new ImageIcon("One_Dollar_Coupon.gif");
     Icon threeDollarCoupon = new ImageIcon("Three_Dollar_Coupon.gif");
     Icon tShirt = new ImageIcon("TShirt.gif");
     Icon youLose = new ImageIcon("You_Lose.gif");

You are using the ImageIcon constructor that takes a file name argument. When you create the jar file the source for the images are no longer files but entries in your jar file. You have to access them using the ImageIcon constructor that takes a URL argument.
The actual URL you use is obtained (eg) from the Class method [getResource()|http://java.sun.com/javase/6/docs/api/java/lang/Class.html#getResource(java.lang.String)].
Suppose your Fifty_Cents.gif was in your jar file in the folder "images" then you could say:
Icon fiftyCents = new ImageIcon(getClass().getResource("/images/Fifty_Cents.gif");Note the use of forward slashes and the fact that Fifty_Cents.gif has to be capitalised exactly as it is within the jar file.
There are other ways of organising the resources - see the getResource() documentation for details.

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I have a package called voiceexpert which contains three classes: Disease, DiagnosingEngine and Symptoms which is a JavaBean. Symptoms makes use of Disease and DiagnosingEngine objects.
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Edited by: Adeyi on Feb 24, 2010 2:26 AM
Edited by: Adeyi on Feb 24, 2010 2:34 AM

Adeyi wrote:
..I created a Manifest.txt file inside c:\diagapp3 containing the following:
Main-Class:voiceexpert.voiceexpert.Symptoms
Note: I created the Manifest.txt using utf-8 encoding. My code is to be used in a third-party application and that is why it does not contain a main method.Why are you specifying a main-class when the API has none?
The link I was referred to..What link? Just imagine for the moment that the Internet is a big place and we are not psychic.

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Icons disappear when creating a jar file.

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