1. We have used private instance variables, public constructors, and public methods. 2. Accessor methods are not usually void, because they use the return value to provide some information about the...

1. We have used private instance variables, public constructors, and public methods.

2. Accessor methods are not usually void, because they use the return value to provide some information about the current state of the object. Modification methods are often void because they change the object but do not return information.