title: How to substring with double slashes?
body: <p>Why does the following not print <code>www.google.de</code>?</p>
  
  <pre><code>String url = "http://www.google.de";
  System.out.println(org.apache.commons.lang.StringUtils.substringAfter("://", url)); 
  //prints "" empty
  </code></pre>