Thank you! Until your response I wasn't aware of the smack-tcp*.jar file because, for some unknown reason, it wasn't extracted when I unzipped the http://download.igniterealtime.org/smack/smack_4_0_6.zip file. Also, it isn't mentioned in the list of jar files on the Getting Started page, and based on that page I incorrectly thought that the core file was all I would need for the basic code snippet.
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