Java constants in Freemarker template

Hi,
Iam developing a portlet application in which Freemarker templates we are 
using for View.

Iam trying to use the constants present in Java class file in the freemarker 
templates. I have the read the posts which says that we can use java constants 
in the Freemarker templates by using the following commands.

${stack.findValue("@fully.classified.classname@constantName")}

But, When Iam trying to access the constants in my template file using the 
above command, Iam getting the below freemarker exception.

freemarker.core.InvalidReferenceException: Expression stack in undefined.

can any one please let me know whats wrong here and how can we access 
constants present in Java class/Interface file in the Freemarker template file.

Thanks,
Sunil.




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