Help to understand the issue with protected method

Question

I\'m reading Sybex Complete Java 2 Certification Study Guide April 2005 (ISBN0782144195). This book is for java developers who wants to pass java certification.

Answer 1

Because variable type is irrelevant here till it is 'sane' in context of question. As method abby() belongs to X (and Y inherits it), it doesn't matter with what type variable referencing instance of Y is declared: it can be either X or Y. Be abby() accessible, we could call it through both variables:

X myY1 = new Y();
myY1.abby();

Y myY2 = new Y();
myY2.abby();