Introduction
Inheritance
  Demo 1
Overriding
  Demo 2a   Demo 2b
this,super
MoreConstructors
  Demo 3
Abstraction
Interface 
  Demo 4
Casting References
MoreAboutArrays
Object class
Class Summary
Exercises

In Chapter 3 we introduced the basics of classes and objects such as the class definition, instantiation, value and reference. We emphasized the analogy of classes with data types.

However, the class approach allows for more than just defining a new data type. Java allows you to build upon, or extend, a class to create enhanced classes with addition capabilities. Such class inheritance is one of the most powerful aspects of object oriented programming.

This topics in this chapter:

• Class Inheritance - creating new classes out of old ones
  • Demo 1: Class Inheritance
• Overriding - in the subclass using new code for a method in the super-class
  • Supplements: Overriding vs Overloading - how to avoid confusing overriding and overloading.
• Demo 1: Overloading and Overriding
• The this and super reference operators.
• More about constructors, including a discussion of the this() and super() methods
  • Demo 3: Constructors
• Abstract methods and classes
• Interfaces
  • Demo 4: Interfaces
• Additional aspects of classes:
• More about arrays
• Object base class
• Convert objects to Strings

The Chapter 4: Supplements first provides more discussion of classes and objects. Topics include

• Overriding vs Overloading - don't confuse them.
• Annotation in J2SE5.0

The more advanced supplements deal with the issues of classes and security:

• Java Security
  • Class Loaders
  • Class Verification
  • Security Managers

Latest update: Oct. 21, 2004

            Tech
MoreComplexClass
ImprovedHistogram
JavaRandomNums
Vectors & Matrices
Exercises

           Physics
Runge-Kutta 2nd
  Demo 1
Runge-Kutta 4th
  Demo 2
BoundaryVal.Prob
Shooting Method
  Demo 3
Exercises