The best way to use mahout is to use the Maven.Its build tool, a great tool for building and managing a project, however, it throws errors for missing artifacts, etc., but you will find a solution to overcome it using the wiki and the error displayed, it shows you decide after the details of the error.
You can work very well on mahout without creating it. Just download the required jars and add them to BuildPath in eclipse. You can run this as a regular Java program.
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