#48 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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[@bhuvanprasathk]

No one else can teach like you man! you are helping people a lot. Thank you naveen.

[@aakashsinha9641]

"redundancy is crime" - navin reddy

[@ShahriarShihab-lm8jd]

your videos helped me a lot sir,Thank you so much..

[@libspacemacj4590]

Telusko :"You know vhyyy?"

[@user-ef9xs4mk7e]

amazing lecture and lecturer

[@niksyt8666]

actually the your course is not for just the beginner … but what’s the good thing is that .. suppose there is a IT person who don’t study for a while and now he want to recall all then it’s perfect…. and the way you explain is not quickly hit to the new person but it helps when a person go to interview and if they will explain in your style 😂😂😂😂 it will surely selected bcz you are not tell us theory you tell us all practical knowledge which can be quick adopted by a IT Student 🙇🏻

[@OneBitePls001]

amazing dude💯💯💯

[@RangaRajuth]

Simple superb

[@user-zx3so5do1b]

What an amazing lecture! I have one question. In this case, I think it is much easier if I just create two those methods, multi() and div(), in the class Calc. But why we should make another class, AdvCalc?

[@GOKULK-ll8ur]

so that we have two calculators basic and advanced

[@satishkk7548]

Nice video

[@satishkk7548]

Nice

[@kvelez]

public class Main{ public static void main(String[] args) { Advanced obj = new Advanced(); System.out.println(obj.add(8, 3)); System.out.println(obj.mult(8, 3)); System.out.println(obj.sub(4, 9)); System.out.println(obj.div(4, 9)); } } class Calc{ public int add(int n1, int n2){ return n1 + n2; } public int sub(int n1, int n2){ return n1 - n2; } } class Advanced extends Calc{ public int mult(int n1, int n2){ return n1 * n2; } public int div(int n1, int n2){ return n1 / n2; } }

[@c4domer]

why are tthere no coments

[@prathameshpatil1023]

Sir in my laptop it doesn't working with public keyword for classes.but without public keyword it executes Why this problem is occurring

[@_sebastian1734]

Hi, to use the public keyword, make sure you are out of the main class or package. Use a separate class name. i.e Student.java then make it public class Student{}. in the main class or package we can only use the default class

[@rakeshreddy9145]

class name should be same as file name if you use public keyword.

[@Sehore_Defence_Academy]

why you upload sir this series and you have also paid batch binary java batch so is difference in those course

[@bhuvanprasathk]

i think those are live classes.

[@athul03]

Isnt that advanced level of java ?