title: javac no source files found
body: <p>I have the <code>.java</code> file on the current working directory but javac reports:</p>
  
  <pre><code>javac: no source files
  Usage: javac &lt;options&gt; &lt;source files&gt;
  use -help for a list of possible options
  </code></pre>
  
  <p>I'm working on ubuntu.</p>