title: How to create a .jar file using the terminal
body: <p>I'm trying to create a .jar file using the mac terminal but am having bit of trouble. I followed the steps <a href="http://www.sundh.com/blog/2010/01/making-jar-files-on-mac/">here</a> but was unsuccessful. I got this error message:</p>
  
  <pre><code>Failed to load Main-Class manifest attribute from
  aclient.jar
  </code></pre>
  
  <p>So how exactly do you go about doing it? My java program is called Main.java and I have compiled it into a .class file. Now what do I do?</p>
  
  <p>Thanks</p>