Abstract Data Type & Java Interface

After reading this chapter and engaging in the embedded activities and reflections, you should be able to:

• Criticize design decisions for a simple type hierarchy in Java made by employing the inheritance mechanism.
• Recognize the usefulness of abstract classes and abstract methods to provide code reuse as well as a common interface among subtypes.
• Identify the syntax of Java Abstract Classes and contrast it with Java Interfaces syntax.
• Contrast the utility of abstract classes and interfaces.
• Catalogue class relationships into is-a and has-a classes and separate is-a relationships into "extends" and "implements" types.
• Distinguish between interfaces and implementations.
• Define what an Abstract Data Type (ADT) is.
• Declare an ADT using a Java interface, with complete Javadoc comments.
• Understand the importance and the use of pre- and post-conditions for documenting a method's operation.
• Write pre- and post-conditions for a given method definition.

Starter code for this chapter