#21 Class And Object Theory in Java

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In this lecture we will learn:
- Java is an object-oriented language
- What are objects?
- What are classes?
- How do classes and objects create?
#1
Java is Object- Oriented Programming:-
- In the real world, everything is an object like a pen, mouse, glass, etc.
- Every object has two things:
- An object knows something ( It has some properties)
- An object does something( It has a behaviour)
- Every object has a property and behaviour. It can also have multiple properties as well as multiple behaviours.
- To create an object, first, we need to create a class.
- Class act as a blueprint that contains the designing of an object.
#2
- JVM creates objects in Java.
- JVM creates an object but it requires a blueprint.
- Thus, you create a class file that class file gets compiled to create a byte code and that byte code goes to the JVM and then JVM creates an object.
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[@wilwill6826]

I subscribed this month. I am starting to see a pattern with Head First Java. Great training, Sir!

[@polytrave]

i have a test tomorow about this. thank you for explaining!

[@user-ty8xt1dj3i]

one of the best lecture, having proper explanation. Thank you

[@saieswar7701]

0:31 that hits hard

[@Deepuarakatla]

Hello reddy sir...thank u for this series❤

[@Mahi_Vasu_7]

hi sir, please make a video based on core java interview questions for freshers pls........

[@hrishikeshmukherjee813]

Thank you

[@Mamthaaaaaa]

Wow thank you sir

[@zr0724]

tell us about framework in java

[@sanketdevray4590]

Object is something which have state and behaviour that's it.....

[@ramakrishnanalluri2547]

thanks sir

[@kapilvadher4935]

Sir, you look like Leonard Hofstader 😎😎

[@akshaygalande2318]

What is present in the class file which is compliled

[@vipulthapliyal5464]

a x = new b (); sir what does it mean can object have different refrence and created for another class ???? please explain me its so confusing

[@sridharkarri4434]

it is the concept of upcasting assining the parent reference variable to the child class it can access only parent variables and some overidden methods

[@vipulthapliyal5464]

@@sridharkarri4434 so what it means when we created aj object of a class and different refrence of class?

[@informationtechtips5391]

@@vipulthapliyal5464 This possible when B class is child of A;
suppose we have create class named as Animal and then cat class extends Animal class
so cat is bascially what is Animal
so we can write Animal c1=new Cat();
c1 is type of Animal but it is object of Cat class

[@vipulthapliyal5464]

@@informationtechtips5391 ok thanks sir

[@navinderwadhwa8444]

Sir so object is the output we get??

[@NicholasYg]

No, object is an instance of a class. An object can define some properties/variables and use some methods AKA functions

[@Welcome_to_reality.]

Don't Objectify me sir i am not a object

[@GargeyasaikrishnaChava]

In java bro

[@gersonmuel7546]

😂😂😂

[@pasindupabasara1293]

😂😂

[@sweet_alchemy]

😂😂😂

[@neocoretec]

0:27 🤣

[@ajitdeshmukh6156]

Hello sir....make a video on how to dance

[@abdulbasith3818]

😢

[@Gamuss12345]

XD

[@sanketdevray4590]

In fact human thinking is object oriented 😅

[@adss5095]

24.05.24.10.07

[@Mahi_Vasu_7]

how to handle the pressure during a interview

[@sivareddy412]

Learn perfectly and u should feel u know all concepts and even u don't know some concepts u should feel the same then only u can overcome from that fear

[@ramakrishnanalluri2547]

.

[@ramakrishnanalluri2547]

...

[@k_arsh_10]

Everything is an object, even women ?