Object Oriented thinking has consistently placed the inheritance relationship as a key feature of its approach. We review how this relationship is realized in Java. As you will see it is a complex relationship, and we will return to the difficulties it can cause in a later topic.

interfaces & Interface inheritance are considered a 'safer' form of inheritance. We review interfaces in general and how interface inheritance operates

All programming languages will have support for a range of common data structures. Unlike many dynamic programming language, collections are implemented as a standard library in Java. We will survey the major features of this library, focusing on the principle interfaces and implementations.

Review generic Collections and typical collection usage patterns. Summarize primary collection review performance issues. There is considerable more to collections, which should may investigate independently.

Extend the pacemaker application to include Activity and Location classes + associated commands. Once these are in place, incorporate a serialization mechanism to enable users & activities to be persisted to a file. We will then try to generalize this mechanism, which will enable us to experiment with alternative serialization formats.