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Java - Coggle Diagram

- - - - Hidding internal state and access through methods
    - - Exposing only essential functionality
    - - a class can inherit properties or behaviour from another class
    - - different objects can be treated through the sam interface
  - - - Class should have only one reason to change
    - - Open for extension, closed for modification
    - - Any child class must behave as expected when accessed throught their parent class
    - - Dont force classes to implement interface method they dotn need
    - - depend o abstraction not implementation