How Do I get icons image directory to work in a JAR file?

Question

Yes, I must admit after going through the tutorial and other stuff I am stiil stumped
I have an application that uses the jlfgr icons for the toolbar, and it works fine as long as i actually run it from the directory that it is in.
I would like to put in into a jAr file, and be able to execute it from other places.
I have a Directory named PhoneBook
in that are the classes I use
AddressBook - the main class
PersonEntry - The 'data class'
and various other things like FileFilters.....
inside that directory there are two more:
images - contains all the icon images
Data - where the default 'database' entries are stored.
I use code like this:
     private void fillToolBar( JToolBar bar )
          Dummy = new JButton(new ImageIcon("images/New16.gif"));
          Dummy.setActionCommand("New");
          Dummy.addActionListener(this);
          Dummy.setToolTipText("New");
          bar.add( Dummy );
          // etc etc
to get all the icons into the toolbar
I have made a Jar file that has all the classes and all the directorys with the icons in it
and so the program runs, but does not get the icons for the toolbar, I just get a whole load of 'dud' buttons.....
AS this is the first time i've ever got the GUI to look right rather than just the code functioning properly
I'd like to get the whole thing in a working Jar file
So Could someone show me Step By Step, How I get my classes and images into a Jar file
so that i can from a different directory go
java - jar Phone.jar
and have the GUI come up with all the images, assuming I'm totally thickheaded when it comes to Jar files.?
I also can't get the images to show up if I merely run the 'program' from another directory than the one it is compiled in
I can get the program to run, just not access the images with something like
java -cp blah/blah/blah AddressBook
{the main class is AddressBook }
the data directory can be anywhere as I use a JFileChooser to allow the user to open and save desired files.
I really would appreciate some clear workable help. {though I'm running out of Duke Dollars...}

Answer 1

What you need is a correct path to the directory
inside of the jar. This can be accomplished by adding
a line to your main program like this:
URL
url=myProgram.class.getResource("images/New16.gif");
Dummy = new JButton(new ImageIcon(URL));
where myProgram.class is the name of the class
file that contain the main method.
Hope this helps....
;o)
PS: I don't want your dukes...I got them coming out of
my ears!
O.K, that works thank you.
I put something like:
for all the 'buttons' in the toolbar
URL url = null;
Class ThisClass = this.getClass();
url=ThisClass.getResource("images/New16.gif");
Dummy = new JButton(new ImageIcon(url));
Dummy.setActionCommand("New");
Dummy.addActionListener(this);
Dummy.setToolTipText("New Database");
bar.add( Dummy );
etc for all the rest of the 'buttons'
After Reading the API docs on URL's etc I'm still not sure as to why it works, but it does....
I am able now to place the class files in a jar along with the images and it all works fine
although now I don't quite follow all my code....................
I assume that
url=ThisClass.getResource("images/New16.gif");
returns some sort of 'relative url ' ???
Thanks for the help though.