I am in java programing this year in college. First couple of chapters have went fine. They have us learning by using "notepad" and the command prompt. I had just completed my latest assignment and went to compile it and it told me "class or interface expected". I figured I did something wrong. I went and retrieved another assignment that I have already ran know it works. It compiled fine, but when I try to run it gives me "java.lang.noclassdeffounderror". I tried other assignments that I knew were wright, and they say the same thing. Any help will be greatly appreciated.