Extract the files into the root of your classpath folder.
After
extraction the .java files should appear in folders under com/idautomation
After editing the .java files you should be able to compile them. Because they
are already in your classpath, you are ready use the library.
The source
code for the barcode generation classes should not be needed. However, they
can also be supplied with the purchase of the Unlimited Developer License and
a signed Source
Code License Agreement.