title: Selecting a number from natural number < n excluding a possibility
body: <p>Given n natural number starts from 0, and  <code>b</code> which is a number in between 0 to n
  I wish to randomly select a number excluding <code>b</code>.</p>
  
  <p>Say n is 5
  then The number to be selected is <code>{0,1,2,3,4,5}</code>
  say b is 4,</p>
  
  <p>then my random selection is from <code>{0,1,2,3,5}</code></p>
  
  <p>A way to do this is to do a while loop, until the random.nextInteger() does not find a 4.</p>
  
  <p>Is there a easy to to do this other than using a while loop?</p>