Getting error while using Dataprovider annotation

Hi Team,

Getting below error while executing Testng "DataProvider" annotation.
I added both file
googlecollection-exp.jar
com.google.guava_1.6.0.jar
on location C:\Program Files\Java\jre1.8.0_77\lib but still getting same error. Please check if i am adding on correct location.

Please refer attached file for class detail and error.
Please check and update.

Thanks