title: Eclipse package vs. Eclipse folder, what is the difference?
body: <p>Good time of day.</p>
  
  <p>For a long time does not give rest to the question that periodically arises when working on projects.</p>
  
  <p>What is the difference between Eclipse package and Eclipse folder.</p>
  
  <p>I understand that structurally there is no difference in the directory tree. But Eclipse also somehow discerns in the Package Explorer, that's packages, they need to display another icon, you can show them in Flat form, they can lead the way to shorter species, unlike folders, which are displayed with another icon and display all of the consistent directory structure.</p>
  
  <p>How does Eclipse understand that there is a difference between them? Where does it store settings to understand the difference? Is it possible to configure the package value manually somewhere in the config files or in Eclipse settings?</p>
  
  <p>The issue arose after migrating the project from another IDE, and after migrating the part of the project directories located in the test directory did not get the package status, which led to an error in the classes indicating the package. I. e. all structure of directories corresponds to structure of the necessary packages, but, without a mark that these directories are packages classes give out errors.</p>
  
  <p>Thanks in advance.</p>
  
  <p>P.S. Sorry, text was translated by machine :).</p>
  
  <p>P.P.S. I asked the same question in the russian part of stackoverflow, but didn't get the answer, Does anybody know the answer here?</p>