Choosing Classes

• A class represents a single concept from the problem domain

• Name for a class should be a noun that describes concept

• Concepts from mathematics:

   Point

   Rectangle

   Ellipse

• Concepts from real life:

BankAccount

CashRegister

• Actors (end in -er, -or) – objects do some kinds of work for you

Scanner

Random // better name: RandomNumberGenerator

• Utility classes – no objects, only static methods and constants

Math

• Program starters: only have a main method

• Don't turn actions into classes:

Paycheck is a better name than ComputePaycheck