title: Can we access methods of The JAR file has no source attachment?
body: <p>I have a jar file which has no source attachment, rather a compiled set of classes. Would I be able to access those?<br>
  Say a class X, which had methods A, B and C and many such classes. We make a jar out of them. If I place together all the compiled classes in a jar, would I be able to use them.<br><br> 
  Beacause if I try to use. I get a statement
  <br><code>The JAR file has no source attachment</code>, which I am confuses is an error, a warning or just telling I can't see the implementation.<br>
  PS: Please don't say try and see, I know I should but I am on a clock.<br>
  Edit: My source not found snapshot is added.
  <a href="https://i.stack.imgur.com/uuPW0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uuPW0.png" alt="enter image description here"></a>
  Thanks</p>