INTRODUCING CLASSES:

A class is a blueprint of set of objects that share common characteristics and behaviour. An object is its instance.

A method is an association operation of an object. The 'behaviour' of object is represented through methods.

Objects represent the abstraction represented by the class in real sense.

A class represents an abstraction where characteristics are implemented through data and behaviour through methods or functions.

In OOP(object oriented programming), objects are defined by defining a class for them.

Object Factory is producer of objects, that accepts some basic information and creates objects based on that information.

A class is an Object Factory. It contains all statements needed to create an object, its attributes as well as statements describing operations that the object will be able to perform.