NoClassDefFoundError

I have created 2 forms and they are in the same folder. I put

package ListSaver2;

at the top of each .java file

When I compile I get this..

java.lang.NoClassDefFoundError: DataStorageFacility (wrong name: ListSaver2/DataStorageFacility)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java :539)
at java.security.SecureClassLoader.defineClass(Secure ClassLoader.java:123)
at java.net.URLClassLoader.defineClass(URLClassLoader .java:251)
at java.net.URLClassLoader.access$100(URLClassLoader. java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java: 194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 89)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 35)
at java.lang.ClassLoader.loadClassInternal(ClassLoade r.java:302)
Exception in thread "main"


Here is main:
public static void main(String args[]) {
new DataStorageFacility().show(); //trying to show itself
}

What is DataStorageFacility?

is it a part of the same package?

Yes. I just found the problem. I mounted the wrong folder. I went up one level and now it works.