PPT Slide

Classes and Objects

Class:

describes the form of an object,

a template or blueprint or mold

specifies data representation, behavior, and inheritance (via variables, methods and parents)

Object:

an instance of a class

--has unique copy of every non-static variable (i.e., the “instance variables” but not the class variables).

Naming Conventions:

Classes: Identifiers begin with cap letters for

each word in the Identifier,

e.g., NeuralNetwork.java

Objects: Identifiers begins with lower case letter,

then caps for other words in identifier,

e.g., myObjectIdentifier

Difference between “a class and an object of that class” is analogous to the difference between “a type and a variable of that type”.

KEY CONCEPT