title: Eclipse - Can't View or Open Java files in Package Explorer to Editor
body: <p>I clicked something or accidentally drug a file that was open in the editor and now it is no longer displayed. 
  If I double click on the file in Package Explorer it doesn't show in the editor like it used to. I have looked all over and can't figure out how to get this file back in the editor. 
  I thought clicking File - Open File would do it but that displays an open file dialog.</p>
  
  <p>Another way to simulate this is to put the cursor in the editor for an open file and select File - Close. This closes the file but then if you double click on the file in the Package Explorer it doesn't open it in the editor anymore. How do I get these files to display in the editor again?</p>
  
  <p>I also tried right clicking on the file and selecting "Open". This does not display in editor either.</p>
  
  <p>I also tried right clicking and selecting "Open With Java Editor". This does not work either.</p>
  
  <p>If I clicke "File" and then the name of the file in the MRU list . This does not work either.</p>
  
  <p>Also, double clicking a file in Package Explorer fails to open any file. The file shows in the File MRU list but does not display in editor. Can not figure this out.</p>
  
  <p>Also, if I select "Back to" or "Forward to" arrows on toolbar, it tracks the file in the Package Explorer by highlighting it but the file does not display in an editor like it used to. </p>
  
  <p>Also, I have tried "File Open" browsing to the physical location and selecting it but that does not display in the editor either.</p>