How to implement TableFilter functionality

I am trying to implement table filter with help of the following tutorial link

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/60d5b593-ba83-2910-28a9-a7a7c7f5996f.

How can i get TableFilter.java class which is used in above tutorial.

Can any body suggest me how to proceed further.

Thanks in advance...