title: What does an orange square by folder in Package Explorer mean?
body: <p>I'm completely new to Java and Eclipse. I developed my first "Hello, world" program the other day following along with a tutorial. I understand most of the Eclipse UI since I worked with Flash Builder for awhile which was built on top of the Eclipse IDE.</p>
  
  <p>My question is, what does an orange square by folder in Package Explorer mean exactly? I imported the project "Hello, world" into the workspace on OSX and that's the first time I ever seen this orange square. I am really curious about it as it isn't on any of the rest of my projects?</p>
  
  <p>I referred to; <a href="http://help.eclipse.org/kepler/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm" rel="nofollow noreferrer">http://help.eclipse.org/kepler/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm</a></p>
  
  <p>For a reference of icons in the Kepler IDE (btw that's what I'm using) and I found an orange square amongst the icons labeled "a monitor that is owned by a thread"; I don't understand the termonology used though... I don't even know if that is the correct icon I'm looking for?</p>
  
  <p>Here it is;
  <img src="https://i.stack.imgur.com/5PL7w.png" alt="A moniter that&#39;s owned by a thread???"></p>
  
  <p>And here's a screenshot of my package explorer...
  <img src="https://i.stack.imgur.com/QlR7a.png" alt="What does that orange square mean???"></p>
  
  <p>See them orange-looking squares? They look very similar but I'm not 100% sure. I really appreciate your help on this.</p>
  
  <p>Thank you!</p>