Eclipse editor won't open

Question

My Eclipse cannot show the editor window.

Error:

Could not open the editor: The editor class could not be instantiated. This

Answer 1

I faced the same issue. It was basically caused by a version mismatch of the jadclipse jar. Initially I had jadclipse_3.2.1.jar but then I updated to net.sf.jadclipse_3.3.0.jar. Resolved the issue.