Object-Oriented Thought Process, The, Second Edition

Public Interface Methods

Both the constructors and the accessor methods are declared as public, and are part of the public interface. They are singled out because of their specific importance to the construction of the class. However, much of the real work is provided in other methods. As mentioned in Chapter 2, the public interface methods tend to be very abstract, and the implementation tends to be more concrete. For this class, we provide a method called giveDestination that is the public interface for the user to describe where she wants to go:

public void giveDestination (){

}

What is inside of this method is not important at this time. The main point here is that this is a public method, and it is part of the public interface to the class. ...