How to include third party libs in your Jar using Ant

Want to make an executable jar file and have it include all your 3rd party libs?  Building your jar file with ANT? This page helped me a lot:

https://ant.apache.org/manual/Tasks/jar.html

In particular, this excerpt:

Creates an executable jar file with a main class "com.acme.checksites.Main", and embeds all the classes from all the jars in lib/main.