title: get all absolute paths of files under a given folder
body: <p>I need to hold in memory all absolute paths of file names under a given directory.</p>
  
  <p>myDirectory.list() - retrieves String[] of file names only (without their absolute paths).</p>
  
  <p>Don't want to use File Object since it consumes more memory.</p>
  
  <p>Last thing - I can use apache collections etc. (but didn't find anything useful for that).</p>