Call B.m() from C.main() and it should print "content"

StaticAbstract.java

// The idea is of call B.m() from C.main() and it should print "content"
// Calling B.m() from B.main() works correctly but Calling it from C.main() doesn't works...

public abstract class A {
    public static void m() {
        StackTraceElement[] elements = Thread.currentThread().getStackTrace();
        StackTraceElement element = elements[elements.length - 1];
        try {
            Class classe = Class.forName(element.getClassName());
            System.out.println(classe.getField("ATTR").get(classe));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

public class B extends A {
    public static final String ATTR = "content";

    public static void main(String[] args) {
        B.m();
    }
}

public class C {
    public static void main(String[] args) {
        B.m();
    }
}