from the docs: http://joda-time.sourceforge.net/installation.html
"The download will contain the joda-time jar file. Once you add this to your classpath you will be able to use Joda-Time."
Which means:
- you have to extract the zip file you have downloaded.
- it is indifferent, where you put the contents of the zip
- you'll have to add the jar file (which were in the zip) to the classpath of the project. In Eclipse: right click on the Project/configure build path/add JAR
Once you have added the JAR to the classpath, you can use it in any class of your own. You'll just have to import the Joda class you are using. e.g.:
import org.joda.time.DateTime;
keep it up