title: Do the methods in Apache's FileUtils peform synchronous (blocking) i/o?
body: <p>Do the methods in Apache's FileUtils perform synchronous (blocking) i/o?</p>
  
  <p>I am making a call to FileUtils.<em>copyDirectoryToDirectory</em>. In my next line, I want to delete the directory that I copied.</p>
  
  <p>Example:</p>
  
  <pre><code>FileUtils.copyDirectoryToDirectory(source, destination);
  FileUtils.deleteDirectory(source);
  </code></pre>
  
  <p>Just want to make sure this is "safe" and asynchronous (non-blocking) i/o isn't happening.</p>
  
  <p>Thanks.</p>