Java enums, static class variables - why can't I do this?

I am getting a "cannot be resolved" error when I try to do this:

class Tag{
   public static final int blah = 1231; 
}

enum Things{
    COOL (Tag.blah, "blah"); //err开发者_StackOverflow中文版or here
}

the compiler complains that it cannot find the Tag class on the line above.

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Visibility is probably the error here. Your class Tag has default visibility, so I guess your enum is not in the same package. Use public class Tag

EDIT:

this compiles from inside a common outer class:

class Tag {
    public static final int blah = 1231;
}

enum Things {
    COOL(Tag.blah, "blah"); // error here

    private Things(final int i, final String s) {
    }
}

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The following complete EnumTest.java file compile. I'm not sure what your problem is; there isn't enough information.

public class EnumTest {
    class Boo {
        static final int x = 42;
    }
    enum Things {
        X(Boo.x);
        Things(int x) { }
    }
}

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Well turns out the error was just stupidity on my part.

I was referring to a member variable, (blah in above example) that did not exist! So it wasn't resolving Tag.blah!

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Have you defined the constructor of the COOL enum? You are passing it parameters, but the default constructor does not accept any.