Need help on running playground.Test

Module Development
1

Successful build and installed the WeatherModule but when trying to run playground.Test I got the error:

java.lang.NoClassDefFoundError: playground/Test
Caused by: java.lang.ClassNotFoundException: playground.Test
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Exception in thread “main”

Need help!
Thanks,
Tac.

2

I unrar the downloaded zip file to eclipse workspace and import to project.
Before, I just copied the example directory to workspace and import.
This fix the problem that I have for this playground.Test