PPT Slide

Visibility and Access

Visibility Modifier:

Access by: public protected private

Every class Yes No No

A subclass Yes Yes No

An instance of the class Yes Yes Yes

Always specify a visibility modifier.

Guidelines: Only make public methods that are in the class’s “contract”

Make all fields private

Make all other “private” methods protected

Don’t leave off the modifier unless you know about packages

Can an object use a field or call a method?