1. Introduction
2. Subtypes and Polymorphism
3. Subclass Example
4. Abstract classes
5. An IntList class
6. Checkpoint 2
7. Reflection

Reflection

As you turn off your Eclipse and move on to other things, ask yourself some difficult questions:

• Why must a call to the superclass constructor be the first thing that appears in a subclass constructor?
• Would you ever want a class to inherit from multiple, independent superclasses?
• The keyword final can precede class. A final class cannot be subclassed. Why would one want to impose this restriction? (The String class is final.)