#49 What is Inheritance in Java

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In this lecture we will learn:
- What is inheritance in Java?
- Use of extend keyword in inheritance
- The main aim of inheritance
- Important points related to inheritance

#1
For every class that we create in a code, there will be a class file.
- Inheritance helps to add more features by inheriting the class.
- For inheritance, we only required the class file. There is no need for a java file.
- extends keyword is used in inheritance to inherit properties of a parent class.

#2
- The main aim of inheritance is to implement the concept of reusability, saving our time and resources and also creating better connections between different classes, and achieving method overriding.

#3
Points related to inheritance in Java:-
- The superclass of every class is an Object class.
In the absence of any other explicit superclass, every class is implicitly a subclass of the Object class.
- A superclass can have any number of subclasses but a subclass can have only one superclass.
- Constructors are not members, so they are not inherited by subclasses, but the constructor of the superclass can be invoked from the subclass.
- A subclass does not inherit the private members of its parent class.

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