To answer your question about the static context error, you're trying to access CdwArtist's method .getValue() without ever making a CdwArtist object or declaring the getValue method as static (not recommended).

Try creating a new CdwArtist object and calling the getValue() method from it after it has been populated with data.


Again, that's because nstock and price are inside of CdwArtist (Compactdisk) but you do not have a CdwArtist you are getting the value from. Create a new CdwArtist with it's values set and call the variables from the said object.



Remember, the computer only does what you tell it to. If you tell it to use something like a method or variable from another class without telling it it's in the other class, the computer doesn't know to go looking for it, it only knows that it doesn't have what it needs (hence the error).