Introduce syntax of Kotlin

1. Inheritance
Kotlin Study Group
John

2. Hi, I am John
- Android Developer
- Work on Rakuten Viki
- Use Kotlin for 2 years
- Linkedin:
https://www.linkedin.com/in/chang-john-0a95237a/

3. Outline
- Preface
- Creating a Subclass
- open correspond to : operator
- open correspond to override
- protected modifier
- polymorphism mechanism
- final
- Type Checking
- type casting(as)
- smart casting(is)
- Any

4. Preface
- Consider purpose of inheritance: shared common code and polymorphism
- It’s more difficult than Java to achieve polymorphism
- It’s more convenient than Java to cast type

5. Creating a Subclass - open correspond to : operator
Base Class
Subclass

6. Creating a Subclass - open correspond to override
Base Class
Subclass

7. Creating a Subclass - protector modifier and open
correspond to override
Base Class
Subclass

8. Creating a Subclass - polymorphism

9. Creating a Subclass - final

10. Type Checking

11. Type Checking

12. Type Checking - type casting(as)

13. Type Checking - safe cast operator

14. Type Checking - smart casting(is)

15. Smart Cast under the hood

16. Why need Any?

17. Reference
- Typecasts