Solution:Error adding derby jars to project

I recently trying to add the derby plugin into the eclipse. When I try to add derby nature (PS: right-click on the java project -> "Apache Derby" -> "Add Apache Derby nature"  ),I get the pop up says :

Error adding Derby jars to the project: org.eclipse.ui.internal.WorkbenchWindow cannot be cast to org.eclipse.jface.window.ApplicationWindow

error pop up

Does this picture look familiar? Error adding Derby jars to the project

What I was Using is when facing this problem :
  • jdk1.7.0_03
  • Eclipse IDE for Java EE Developers (Win32) version Juno (build from 2012/06/14) 
  • derby-core-plugin 10.8.2 and -ui-plugin 1.1.3 (as there is no eclipse plugin for the latest version 10.9.1.0) 

I also google about this problem before but i can't find any solution. After I try many time ,I finally found a way to solve it! A bad method,but take a look!

Solution:
The solution is download another version of Eclipse IDE for Java EE Developers like Europa!
You can download the europa version at the eclipse website.
http://www.eclipse.org/downloads/packages/release/europa/winter
Then follow the instruction to install derby into the eclipse.It should be work!At least it work on my computer.
If you can solve the problem using the juno version , you may share the method at the comment below! Thank you for reading.

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