This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Your class must extends the class that contains the protected method you are going to call. If you just include the class as a member, you are not allow to invoke the method, unless you are of the same package of that class.