KOTLIN BASIC III (OOP)

• Class, Object, Initializer

  

  

• Shadowing

res -> a is 5

it is useful for decoupling the code from other parts of the system(names are bound to the current scope).

• Get / Set

 

• Data Class

• Inheritance

• Interface (abstract variable/method + it could inherit from another interface)

maxSpeed and drive should be implemented within inherited ones

override variable maxSpeed + method drive()

EvCar inherits from interface as a second child class

brake function works differently according to its class

• Abstract class

- non-instanitiated

- subclasses could inherit from it

- the members are NON-abstract unless the keyword <abstract> is declared

 

🧡💜 Abstract class vs interface

	Abstract class	Interface
Constructor	O	X
Multi-Inheritance	X	O
Field	O	X

• Typecasting

 

 

 

 

 

 

 

 

Reference : Kotlin Android Tutorial / tutorialsEU / Youtube or Udemy