Eclipse Cannot create in-place editor

Question

I have a troubleshoot problem. My eclipse don\'t want open class in the package editor.

Error, what i\'m having -

Answer 1

Probably your File Association settings are messed up.

1. Open Window -> Preferences -> General -> Editors -> File Associations.
2. Check if the file type (*.java) is in the list.
   1. If it's in the list, make sure the correct editor is selected as default.
   2. If it's not in the list, add it and assicate it with the correct editor.