Oh i only copy that one part.....
Is that why its probably not working?
I need 2 files to make this program work?

saucer is an object of TYPE Disk. Disk is a class. Remember, in java, Classes are blueprints for objects. So, yes you will need the Disk class. Place the code in the same package as class TestDisk and then if you are still having issues, post back here and we will try and help . Also, I recommend you look at the basics of objects & classes in java:

here

oh... i see. I make another thread, its not about disk but this time I typed the code and the constructor (if thats what its called) the two files are in same pack. but it gives this error: Static Error: No static method in Circle with name 'main' accepts arguments (String[])

this is the link to my other thread: http://www.daniweb.com/forums/post10...ml#post1007535