This document discusses classes and packages in object-oriented programming. It explains that classes describe the characteristics and behavior of objects, and that building a program with classes and objects is called OOP. It also notes that packages are used to group related classes and prevent naming conflicts, with the standard convention being the reversed domain name of the organization followed by a description of the package contents.

1. Class
● Each class describes, in code, both the characteristics and behavior of a particular type of
object.
● What the objects do determines the behavior of the program.
● Building a program with classes and objects is known as object­ oriented programming
(OOP).
● The develop ment of a new ActionScript program starts with a design phase, during which
the program’s functionality is broken into a logical set of classes. Each class is given a name,
a set of features, and a role in the larger program. One class in particular is designated as the
main class. The main class provides the starting point, or program point of entry, for the
application.
● Filename exactly matches the class name
● To prevent potential naming conflicts in program, packages are used.
Packages
● A package is a conceptual container for a group of classes
● By convention, package names typically start with a lowercase letter while class names
typically start with an uppercase letter.
● By convention (but not necessity), package names typically have the following structure:
● The reversed domain name of the organization creating the program
● Followed by a period (.)
● Followed by the general purpose package’s contents
● eg : package com.mudrait.map { }
● Domain names are guaranteed to be unique by the system of authorized top­level­domain
registrars; thus, starting your package names with your organization’s domain name avoids
name conflicts with code developed by other organizations.
●