title: Execute Java from command line
body: <p>I have a folder on my desktop titled "Stuff" and in that folder I have the following:</p>
  
  <ul>
  <li>Hello.java</li>
  <li>mail.jar</li>
  </ul>
  
  <p>And Hello.java imports from mail.jar, so I need to tell Hello.java to look for mail.jar.</p>
  
  <p>From a Windows command line and from a unix command line, how can I compile this and run this?</p>