static import of enums

Hi all,
I am having problems running the example code
at:
http://www.java2s.com/Code/Java/Language-Basics/Javastaticimportenum.htm

I get the following errors while compiling the code:

EnumImporter.java
EnumImporter.java:2: cannot find symbol
symbol: class Grade
import static Grade.*;
              ^
EnumImporter.java:14: cannot find symbol
symbol  : variable A
location: class EnumImporter
    students[0].assignGrade(A);
                            ^
EnumImporter.java:17: cannot find symbol
symbol  : variable B
location: class EnumImporter
    students[0].assignGrade(B);
                            ^
EnumImporter.java:20: cannot find symbol
symbol  : variable C
location: class EnumImporter
    students[0].assignGrade(C);
                            ^
EnumImporter.java:23: cannot find symbol
symbol  : variable INCOMPLETE
location: class EnumImporter
    students[0].assignGrade(INCOMPLETE);
                            ^
EnumImporter.java:28: cannot find symbol
symbol  : variable INCOMPLETE
location: class EnumImporter
      if ((student.getGrade() == INCOMPLETE) ||
                                 ^
EnumImporter.java:29: cannot find symbol
symbol  : variable D
location: class EnumImporter
          (student.getGrade() == D)) {
                                 ^
7 errors

Can somebody point me what i have done wrong?

Put the whole shebang into a package, and import the fully qualified class name for Grade.

Thanks Steve.
It works now.

Look at this Java™ Language Specification page (§7.5) and look for "unnamed package" with ctrl-F. That may tell you why Steve Luke's solution works nicely.

I guess you are referring to section 7.5 where it states

It is a compile time error to import a type from the unnamed package

Thanks for clarifying, Campell.
Edit:
Ah! yes you are. didn't see those brackets while replying.

Yes, that's what I meant