title: Error: package org.apache.commons.codec.binary does not exist
body: <p>I've added <em>commons-codec-1.4.jar</em> in my project file and also added </p>
  
  <pre><code>import org.apache.commons.codec.binary.Base64;
  </code></pre>
  
  <p>But whenever I build it it gives me an error:package org.apache.commons.codec.binary does not exist 
  Why it's not working? </p>