collection rotate

hi,

I was running following example
import java.util.*;

public class aaa {
   public static void main(String[] args) {
      List list = Arrays.asList("one Two three Four five six".split(" "));
      System.out.println("List :"+list);
      Collections.rotate(list, 3);
      System.out.println("rotate: " + list);
   }
}


from link
http://www.tutorialspoint.com/javaexamples/collection_rotate.htm
Iam getting output as
List :[one, Two, three, Four, five, six]
rotate: [Four, five, six, one, Two, three]



I have not understood meaning of output.
>>   Collections.rotate(list, 3);

what above line means.

I see it is not ordered or sorted as well

Any ideas, suggestions, sample code, links, source code highly appreciated. Thanks in advance