Object-Orient Thinking

• Software
  • model of real world
    • an abstraction
      • precise
      • simplifies
        • ignore irrelevant aspects
        • retain relevant concepts and detail
    • the model must reflect the real world with perspective
  • algorithms to manipulate the model
  • object
    • field/attribute
      • stores values and entities
    • methods
      • mechanism to pass a message to object
      • accessor methods
        • access or calculate value base on input
        • do not change state
      • mutator methods
        • change state
        • do not return
      • hybird
        • both accessor and mutator
    • constructor
      • return a instance of current type