Object hierarchical call in JAVA

Question

I have a question regarding the Object hierarchical call.

I have four classes namely A, B, C, D.

D will be set in C; C will be in B; B will be in A.

If I want to do something in class D, I have to call a.b.c.d.setWidth("50%");(a, b, c, d are instance of Class A, B, C, d).

Is that fine to call like that? Will that compromise the performance?

Answer 1

The effect on performance will be very slight... the bigger issue is what that does to your object-oriented model.

Having direct access to the members of a class is frowned apon, and you are running risks of NullPointerExceptions.

What you should be more worried about is the readability and maintainability of your code.