How to replace {0} with real value by using addFieldError(key, string)?

[Emi Lu]

Good morning,

With struts2.1.6, In package.properties:
empty.error={0} cannot be empty.

Setup field error as:

this.addFieldError("username.empty", getText("empty.error"));

But is there a way, I can replace {0} with "username"?

Thanks a lot!

--
Lu Ying

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