title: Check if string has all the letters of the alphabet
body: <p>What would be the best logic to check all the letters in a given string.</p>
  
  <p>If all the 26 letters are available in the provided string, I want to check that and perform so ops. eg. Pack my box with five dozen liquor jugs.</p>
  
  <ol>
  <li>Would using a Hash be useful?</li>
  <li>Or using a bit map? or any other way?</li>
  </ol>
  
  <p>BTW my code would be in Java.</p>