Obfuscate code in Eclipse?

Is there any way of Obfuscating code in Eclipse when the file is built, rather than using external software? Is ther开发者_如何学运维e a plugin that does this?

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Google gives me at least 2 interesting matches

http://www.eclipse.org/forums/index.php?t=tree&th=145868&

http://code.google.com/p/obfuscate4e/