title: Recursively create directory
body: <p>Does anyone know how to use Java to create sub-directories based on the alphabets (a-z) that is n levels deep?</p>
  
  <pre><code> /a
      /a
          /a
          /b
          /c
          ..
      /b
          /a
          /b
          ..
      ..
          /a
          /b
          /c
          ..
  
  /b
      /a
          /a
          /b
          ..
      /b
          /a
          /b
          ..
      ..
          /a
          /b
          ..
  ..
      /a
          /a
          /b
          ..
      /b
          /a
          /b
          ..
      ..
          /a
          /b
          ..
  </code></pre>