title: How to extract the source code from a *.jar file on a Mac?
body: <p>I'm very confused. I downloaded a *.jar file as a bit of software. So, I would like to extract the source code to look at it</p>
  
  <p>I used the command <code>jar xf filename.jar</code></p>
  
  <p>which returned two more <code>*.jar</code> files and a <code>*.class</code> file. I still cannot open these in the terminal with standard text editors. </p>
  
  <p>Perhaps this is not open source software? Is there an alternative to see what has been done here?</p>