Enthuware

What is implicit narowing?

I would assume that it is:
assign a larger type value to a variable of smaller type without programmer doing it?

This discussion should be helpful: https://stackoverflow.com/questions/278 ... es-in-java

But yes, "narrowing" is when a larger type (such as int) (or in case reference types, a super type) is assigned to a variable of of a smaller type (such as byte) (or in case of reference types, a sub type) and "implicit" means without using an explicit cast. Narrowing can therefore happen for primitives as well as for reference types. But implicit narrowing happens only in the case of primitives and only during assignment of constant expressions.

Is there a way to create a short literal?

No, and not a byte literal either.

Hi, Does OCA require to remember the widening or narrowing conversion? Is there an easy way to remember it? Thanks

Yes, you need to know this for the exam. There are only a few simple rules that govern it. You will have to memorize these rules. I am not aware of any other way.