OOP

OOP

1. Class

   • A class describes a group of objects that are all of the same type. A class defines: 1) the attributes or important characteristics that need to be remembered for each object of theclass, and 2) the functions that the objects of this class can perform. A class serves as blueprint for defining and creating objects that are all of the same type.
   • Object
     • A program is made up of one or more objects. Objects are the persons, places or things that need to be modeled in the program. Objects are always nouns, and they must represent something that is important in the system being creating.
     • Attributes
       • Characteristics Data to Store
       • The attributes in a class describe the data items that associated with each object of this type. A variable is defined in the class for each attribute. Each attribute defined in the class must be logically related to the theme or purpose of the class.
     • Functions
       • Behavior Actions Commands
       • The functions in a class define the behavior of the objects in the class. A function is an executable block of code that performs some task. Each function in the class must be logically related to the theme or purpose of the class.
   • Instance
     • An instance of a class is an actual occurrence of an object of the class. A class is a definition of a group of objects of the same type. Instances are the actual objects created from the class type definition.