title: Where do I download all of the necessary classes to write Hadoop MapReduce jobs?
body: <p>I've recently started working with Hadoop and have been learning how to write MapReduce jobs.  All over the internet, I can find examples and tutorials for writing MapReduce jobs, but they all include import statements that go something like 'import org.apache.hadoop.util.*;'. I cannot find where to download any of those classes and I can't even begin writing jobs until I do find them.  Where can I download the necessary plug-in?</p>
  
  <p>I've tried the plug-in that comes along with a Hadoop download and I've also tried a MapReduce plug-in for Eclipse distributed by IBM, but neither has worked.  Where can I download the correct one?</p>
  
  <p>Thanks!</p>