Inheritance in Java | Types of Inheritance | Inheritance Explained | Java Tutorial | Simplilearn

2. Agenda Why do we need inheritance? What is Inheritance? Components of Inheritance Diamond Problem Extend Keyword IS-A Relation Access Modifiers HAS-A Relation Super Keyword Types of Inheritance

3. What is Inheritance?

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5. What is Inheritance? Inheritance is an act through which a new class gets created by acquiring the variables and methods defined in the previous(parent class).

6. What is Inheritance? Food() Fruits() Veggies() Noodles()

7. Why do we need Inheritance?

8. Why do we need Inheritance? We implement Inheritance for multiple reasons. Like: Creating a possibility to add or remove features. To reduce the code length as we reuse the code. More comfortable to develop and maintain the Project.

9. Why do we need Inheritance? Call() SMS()

10. Why do we need Inheritance? Media() Call() SMS() Browse()

11. Why do we need Inheritance? Call() SMS() Media() Call() SMS() Browse()

12. Why do we need Inheritance? Call() SMS() Inherit Media() Browse()

13. Components of Inheritance

14. Components of Inheritance Inheritance has two major components, those are mentioned as follows: Parent class/Super class Child class/Sub class Parent Class Child Class

15. Extends Keyword

16. Extends Keyword The term “extends” is a predefined keyword in java, that allows you to create a new child class by deriving the variables and methods from the parent class to reduce code length and improve the performance.

17. Access Modifiers

18. Access Modifiers Access Modifiers Private Public Protected Default

19. Access Modifiers Default Default Access Modifier is set implicitly whenever you declare a class without a specific access modifier. By default, the access of a class or method, when declared without a specific access modifier, becomes available to any other method or class within the same package,

20. Access Modifiers Public A certain class can be declared as Public by using the keyword “public.” Any class or method when declared as public, becomes available to any class or method declared in the same package, but if a different method or class needs it, it should be imported

21. Access Modifiers Protected A certain class is declared protected by using the keyword “protected.” This provides access to methods and variables of the protected class only to the rightful subclasses and protects the data from any other classes which are not related.

22. Access Modifiers Private A certain class is declared protected by using the keyword “private.” This provides the ultimate protection to the data members and the methods of the private class. This procedure is implemented by class to encapsulate the methods and members.

23. Super Keyword

24. Super Keyword Super Keyword eliminates the confusion between parent class method and subclass method. Super keyword is implemented to access a method or constructor that is defined in the parent class

25. Types of Inheritance

26. Types of Inheritance A A A A B B B C D B C C D Hierarchal Inheritance Hybrid Inheritance Single Inheritance Multi-Level Inheritance

27. Types of Inheritance A Single Inheritance consists of one parent class and one child class. Here, child class inherits parent class methods and data members. B Single Inheritance

28. Types of Inheritance A Multi-Level inheritance is also a parent child inheritance relation but the difference is the child class is inherited by another child class. B C Multi-Level Inheritance

29. Types of Inheritance A Hierarchical Inheritance is a parent child relationship. The only difference is, here, multiple child classes inherit one parent class. B C D Hierarchical Inheritance

30. Types of Inheritance A The name itself explains us all. The Hybrid Inheritance can be a combination of any of the three types of inheritances supported in Java. B C D Hybrid Inheritance

31. Diamond Problem

32. Diamond Problem A Java programming Language does not support Multiple Inheritance as it ends up with a serious ambiguity. B C D Diamond Problem

33. IS-A Relation

34. IS-A Relation Fruit IS-A When a class inherits methods and members from a different class, then the relation is said to be an IS-A Relation. Example: Orange IS-A Fruit. HAS-A Orange Citrus Taste

35. HAS-A Relation

36. HAS-A Relation Fruit IS-A When a class inherits an instance from a different class or an instance or its own class, then the relation is a HAS-A type. Example: Orange HAS-A Citrus Taste. HAS-A Orange Citrus Taste

37. Q&A Session