Written Java Program in Netbeans won't compile..

Hello,
I have written a small Java GUI project.
I did it in Netbeans.
But now I am trying to compile to program in Command Prompt, but it won't compile.
Shows errors.

I would appreciate any advice.
I can share the java files, if requested.

Please show error messages and java code, if it's small.

Hello,
Thank you for response..
I have attached the errors.
I have printed the Screen Image:

Attachment 2091

mainFrame does not exist in the java file ManagerStudent.java.
Why?
I have no idea...

If you would like to get more detailed help with your problem, I suggest posting a Short, Self Contained, Correct Example to get the results you are looking for. This will provide us with the information we need to help you while minimizing the work and confusion on both parties.

To copy the contents of the command prompt window:
Click on Icon in upper left corner
Select Edit
Select 'Select All' - The selection will show
Click in upper left again
Select Edit and click 'Copy'

Paste here.