OBJECT ORIENTED PROGRAMMING (JAVA)

OBJECT ORIENTED PROGRAMMING (JAVA)

1. 1) OOP lets u extend a program without having to touch the previously tested&working code.

   • 2) OOP focuses on data controlling access to code, not steps leading to change the code.

2. Main principles:

   • Encapsulation
     • It hides implementation details and makes data of one class accessible to everyone
   • Polymorphism
     • When some things have the same name for behaviour but they do it differently.
   • Inheritance
     • Class inherits instance variables of super class but may have some differences.