Minimal javac java Example (stand-alone) / classpath hell

I am under the impression that httpunit can run stand-alone.  What
minimal steps do I need to take to build and run Example.java from my
own path, so that I know I'm not corrupting the httpunit project
files?

This is what I've done, but am getting java.lang.NoClassDefFoundError

1) Download http://prdownloads.sourceforge.net/httpunit/httpunit-1.7.zip?download
(link on http://httpunit.sourceforge.net/ page "Download 1.7")
2) Expand httpunit-1.7.zip into its own folder ~/Downloads/httpunit-1.7
3) Open shell and cd to ~/Downloads/httpunit-1.7
4) Run ant jar
5) Run ant run-example
Assumed httpunit is good to go.  Let's start custom "Hello World"
6) Copy httpunit-1.7/examples/Example.java to ~/custom/Example.java
7) cd ~/custom
8) javac -version
javac 1.6.0_24
9) javac -classpath ~/Downloads/httpunit-1.7/lib/httpunit.jar Example.java
10) ls
Example.class	Example.java
11) java -version
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07-334-10M3326)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02-334, mixed mode)
12) java -classpath . Example
Exception in thread "main" java.lang.NoClassDefFoundError:
com/meterware/httpunit/WebRequest
Caused by: java.lang.ClassNotFoundException: com.meterware.httpunit.WebRequest
...
Why did it NOT throw an exception at WebConversation?  WebRequest is
later in the Example.java source file.  Surely it found the classes?

13) java -classpath .:~/Downloads/httpunit-1.7/lib/httpunit.jar Example
Exception in thread "main" java.lang.NoClassDefFoundError:
com/meterware/httpunit/WebRequest
Caused by: java.lang.ClassNotFoundException: com.meterware.httpunit.WebRequest

14) java -classpath .:~/Downloads/httpunit-1.7/build/classes/ Example
Exception in thread "main" java.lang.NoClassDefFoundError:
com/meterware/httpunit/WebRequest
Caused by: java.lang.ClassNotFoundException: com.meterware.httpunit.WebRequest

15) java -classpath
.:~/Downloads/httpunit-1.7/lib/httpunit.jar:~/Downloads/httpunit-1.7/build/classes/
Example
Exception in thread "main" java.lang.NoClassDefFoundError:
com/meterware/httpunit/WebRequest
Caused by: java.lang.ClassNotFoundException: com.meterware.httpunit.WebRequest

What steps am I missing?  Please keep it minimal.  No Tomcat; No more
ant, etc.  Can we just use javac and java now that ant run-example
worked?

I've been trying to avoid using an IDE because I will ultimately run
this on a low power machine.  But maybe I can put everything in 1 jar
using Eclipse and eventually do "java -jar Custom.jar" on the low
power machine.  Unless I am really close above.

Thanks.

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