title: Can I convert eclipse source folders into packages?
body: <p>I've forked a Github project, used Eclipse to clone it locally, and imported that as a general project into Eclipse. 
  The accompanying .project file is an Eclipse .project file with the proper "nature" and "buildCommand" xml tags. 
  So it seems like a valid Eclipse project. However, I'm unable to specify a run configuration or configure the build path. 
  When I select the Build Path popup menu item, it says "no actions available" in grayed out text. When I select "Run/Run As" from the main menu, 
  it shows (none applicable). I'm wondering if the problem is that the project imported completely as source folders: </p>
  
  <p><img src="https://i.stack.imgur.com/lO5Ck.png" alt="enter image description here"></p>
  
  <p>There are no packages to speak of. I created another project from scratch, and created the proper source folders and packages as needed 
  to match the package statements in the source code. After manually importing the source from the git repo, I can build and run that project.</p>
  
  <p>If the lack of packages is indeed the problem, is there a quick way in Eclipse to convert source folders to packages?</p>