title: The import javax.persistence cannot be resolved after deleting Server Runtime Environment
body: <p>I had a working java project, I decided to remove all the Server Runtime Environments in my eclipse. since i am getting many errors like : </p>
  
  <pre><code>The import javax.persistence cannot be resolved
  </code></pre>
  
  <p>,</p>
  
  <pre><code>Entity cannot be resolved to a type
  </code></pre>
  
  <p>...
  can I restore the state of my project ?</p>
  
  <p>After thinking in logical reason , I think that the prbolem issued after that I had edited the PATH Variable in windows , can someone tell me what I shouldhave in this PATH variable to get the package javax.persistence working ?</p>