How to import a Jar correctly ?

hello,

I am learning the basics of Swing / Substance look and feel.
I'd like to add some icons to my Jbuttons. (load, save, delete...)

I came across the graphic library (from java.sun.com). it comes a Jar file that contains gif files.
I've built a class path for the Jar and it is now in the "reference library" folder.

but when I try to do "import thenameofmyjar.*;" where my code is it returns an error.

basically: I know how to import the jar in my project as a reference but I don't know how to make use of it

can someone tell me how to do please?

by the way: if I download a pack of gif from the web for my interface. how would I link these gif files to my project? (do I need to create a jar file for them? if so: is there a tutorial for that? do I need to put them in a folder and reference them manually?)

thanks!

Find this page, then look up the links for the "java" tool. Go through that link and find the instructions about how to add the .jar to your classpath. You should use the -cp or -classpath options; don't set a system environment variable. You may need to do the same for the "javac" tool.

And you don't import jars, you import classes.