No ClassDefFoundError

Hi, Please help with this error. I created my class with package declaration at the top of class and i compiled it with out any error. but to run it is now diplaying the following error Exception in thread "main" java.lang.NoClassDefFoundError:: StouckUI. Please i'm desperate!

1. The argument to the java.exe command is the fully qualified class name. Fully qualified means the packag name plus the class name so you must specify like "java package.name.StouckUI"
2. The .class file must be in a directory structure that matches the package name. Using the above example, package/name/StouckUI.class
3. The root of the top directory must be in the classpath. For example (Windows) you have c:\myjava\package\name\StouckUI.class then java -classpath c:\myjava package.name.StouckUI

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