Accessing static final variable of java inner class

I've seen this nice trivia in the scala mailing list. Zang was asking "how do I access a final static variable of a java class ?", such as:

public class Foo {
 public class Bar {
     public static final String MY_STRING = "myString";
 }
}

Som brought the answer quickly, using:

null.asInstanceOf[Foo].Bar.MY_STRING