8.1 What is Encapsulation in Java Tutorial

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Encapsulation in Java
Binding Data with Method
Getters and Setters
Data Hiding
Encapsulation is one of the four fundamental OOP concepts.
Encapsulation is the technique of making the fields in a class private and providing access to the fields via public methods.
If a field is declared private, it cannot be accessed by anyone outside the class, thereby hiding the fields within the class
Encapsulation is one of the four fundamental OOP concepts.
Encapsulation can be defined as a process of wrapping code and data together into a single unit.
Encapsulation is the technique of making the fields in a class private and providing access to the
fields via public methods.
If a field is declared private, it cannot be accessed by anyone outside the class, thereby hiding the
fields within the class
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[@susobhandas6143]

bad video quality in this particular video: "looks like it was a hectic day, tired but still you're making video, no time for preperation" We salute for your hard work, एही तो है ना हमारी हिंदुस्तानी भाई

[@kritisundurtv9606]

When he used to say guys instead of aliens😊

[@anshumandas5392]

when he started thinking about gaining subscribers XD

[@MrJonnis13]

Sir, you make a wonderful job here. Extremely helpful for a starter. Keep doing tutorials and we will keep following you.

[@siva_subramaniam]

clear and concise explanation. thank you so much.

[@travelnlearn]

Thanks bro for such useful update. May gbu with lots of love success and happiness

[@MrHorizonkid]

You made it so easy, many thanx from Pakistan!

[@joeyjoejoo]

Brilliantly explained. Good man.

[@sharanyajidigam5216]

Sir, at the duration, 5:38 , shouldn't it be S.O.P(obj.getI()), when calling the getI() function instead of S.O.P(getI())?

[@saumyojitdas4212]

MAYBE because when operation of set is done through obj.setI() then we have to mention the object as i am passing value . in case of returning as the control will automatically flow from set to get thats why just caliing will do

[@pratik2617]

yesss

[@anmolthedeveloper]

you've got some awesome teaching skills 👌👍👍

[@utkarshsingh1075]

Easily understood sir... Perfect description..

[@mangeshpatil8810]

Thanks ... great explanation.

[@sreejareddygummi4900]

What is the use of private variables in java ? 🧐

[@Joshuaomorales]

You missed the obj.getI(). Good job though.

[@gauravpathak560]

sir kindly make another video on encapsulation because video quality is not good afterall it may around 7 year old video

[@harekrishnanayak5004]

sir...in the main class i think it shud b sop(obj.getI());

[@pradeepgodavarthi8313]

if u have that sop in getI method then no need ..creating instance of the method ll do

[@kumaiyavlogs5020]

getters and setter can you please clearly explain in about term ENCAPSULATION? why this word ENCAPSULATION came in JAVA ? despite of calling #using of getter and setter methods in java.

[@ramandussa7803]

could you explain what is the difference between Encapsulation and Abstraction..

[@eggiweggsi]

Thank you, Pajeet.

[@justdanaus]

I really hate learning Java until I found your videos, I'm not sure if you're still on here, but thank you for your hard works!!! You're legend.

[@rahulmadakatti]

hello,i think that the sop should be sop(obj.getI())

[@hydro6527]

Sir, add another video related to encapsulation(how it hide unwanted information and shows only necessary information)

[@amitgupta-tz9cc]

in last line S.O.P(obj.getI());

[@thanualekhya4413]

its soooooo understandable

[@syedkhalil6083]

you are amazing , Hats of to your teaching Methodology

[@barath9815]

what u have entered in System.out.println(getI(); gives an error right one is System.out.pritnln(obj.getI());....sir

[@avinashkotni1460]

sir u said that memory is allocated for object by jvm in one lecture .. again u said that memory is allocated for object by constructor . which one is right... ??

[@souvikpal6262]

shouldn't it be s.o.p(obj.getI()); at 5:38 . Please clarify my doubt . I may be wrong . :) Ty love your videos .

[@napialex7539]

I'm screaming! the first video that helped me understood encapsulation! tnx

[@reinobrowne9597]

why you screaming at me ;(

[@Chrisymcmb]

lol

[@TheGeorges101]

omg, i just said the same thing! Scrolled down then saw your comment

[@9528102219]

I lost me hairs from front part of my head... Can someone ask this guy how to bring it back

[@Zzz-nv4xi]

Nit K I just asked him ... he replied "Use getForeheadHairs() {} method" !

[@PacLevkov]

To get your attention.

[@karthi9722]

Where exactly encapsulation is used?...what if the user too knows about the getter and setter method and changed the variable by accessing the method

[@sajalhasan222]

Dear Sir,, you are best... I Love You...

[@shivantkumarpandey2708]

sir how constructor is also called as classes

[@zombnie]

easy and quick. Thanks Navin. Your videos are great for revising concepts before my interviews.

[@aparnavivekanandan4328]

Simple and Understanding explanation Sir. Thanks!

[@mdaliashraf4544]

This guy is a gem when u are actually learning java

[@rahul-sinha]

Still loving your lectures in 2021

[@chvenu3494]

As per your encapsulation video concept is not sufficient. For complete encapsulation we have to restrict with conditions in the Person class, then only we can encapsulate the data. Example: package eiq.samples; public class Person { private int age; public int getAge() { return age; } public void setAge(int age) { if(age < 16 || age > 60){ throw new RuntimeException("Invald Age"); } this.age = age; } } package eiq.samples; public class Encapsulation { public static void main(String[] args) { Person p = new Person(); p.setAge(16); System.out.println(); } }

[@siddharthbhandari7601]

Hi for multiple variable we can use one setter method but getter method we should use seprate for each variable as per below package simple.practice; class Encapsulation_J { private int i, j; public void setI(int k, int l) { i=k; j=l; } public int getI() { return i; } public int getI1() { return j; } } class A { public static void main(String[] args) { Encapsulation_J e=new Encapsulation_J(); e.setI(12, 15); System.out.println(e.getI1()); System.out.println(e.getI()); } }

[@pratik2617]

package com.company; class A{ private int i; public void setI(int j){ i = j; } public int getI() { return i; } } public class Main{ public static void main(String[] args) { A obj = new A(); obj.setI(5); System.out.print(obj.getI()); } }

[@pratik2617]

this code will run

[@lancelottheknight7126]

To those who are wondering, S.O.P() stands for System.out.print() okay?

[@113kishore]

Anyway you are allowing the user to set value right ... Then how exactly you providing safe fairs access??

[@Anilkumar-ec8sj]

Thanks you sir , well explained . Picture/ video quality was not that great little blurr .. and it will be great if you can remove your pic for your channel and make a logo that will look better . :)

[@DeepakKumar-hn5tz]

In your example although u have declared the property of class as private and u exposed accessor methods rather than accessing the property directly we can access using accessor methods so whats the difference in these approaches.

[@anandprakash5880]

it should be obj.getI()

[@tejasvimarumokham2623]

the video quality is not clear.....i mean the appearance

[@bhoomikapandey2728]

please explain.................... int m=100 ;int n=300 ;while(++m --n) ;system.out.println(m);

[@leets4687]

in while there should always be a boolean value in parenthesis. so you cannot increment, decrement, initialize or declare a value

[@BabuKaliyamoorthy53]

Really amazing speech and points.Great ...keep it up sir.

[@ramramesh130]

Sir.. In this encapsulation getters and setter method is mondatory or we can use instant methods also...??

[@Ozzyisunavailable]

not sure if you fixed the problem since the video first came out but camera is a bit noisey, if you can birghten up the room a bit more it shoud get rid of that :] great tutorial though!

[@bhavanim729]

why should v change the value using method?? what is the use out of it. Please reply

[@siddharthbhandari7601]

we need to call getI() using below System.out.println(obj.getI());

[@vijayr1329]

But when I typed this code it is showing can't find symbol method getI() ,plz any one reply if you know.

[@brtlMJ]

Obj.get()

[@jaydobariya7652]

if we can change the value of private variable than what is need of encapsulation

[@AviatorBro]

very poor video quality.. content is good, but no use if u cant see it properly

[@superimaginationland9026]

i did the 360th like guys... thumbs up..

[@rajulama9732]

you are a Great Lecturer.................................................. Man!!!!!!!!!!!!!!!!!!!!!!!!!

[@Nitesh22upsc]

Thanks a lot sir your oops videos saved me ...every questions in exam were from your videos

[@saubhikdatta935]

sop(obj.getI());plz correct it Sir

[@manishasharma5937]

Nice... But try not using 'right' and 'ok' too much it irritates

[@aymanmomin432]

why do we even use encapsulation ??

[@shivashabanpour9218]

Thank's, wonderful job and so easy to understand.

[@ArunraajSingh]

If we can change the value of private variable indirectly(through setxx), then how is the private variable secured, how is it hidden?

[@FaithBiete]

This is what he did not explain.

[@rohitsoni9325]

Focussing Problem of Camera Sir... till @2:07

[@h.cazador]

Great video, but writing is hard to see.

[@nandakumar5406]

your videos are much useful sir, worth watching , you are awesome sir

[@wiki4sport]

Excellent video, congratulations, simple and good explained..

[@travelnlearn]

Very well explained

[@sivasiri935]

Hi sir,What is the use of making variable private?Suppose i have created 2 objects and trying to access variable.Any how ,for each object,JVM will allocate memory separately. So,if we assign value to the variable,it will applicable for particular object only.So,what is the use of privare variable...waiting for reply... Thanks

[@tusharpatel8473]

As you know, encapsulation means hiding internal details of your class from the end user ( entity that uses your class). Now I will give you a real life example. Suppose a doctor John gives patient 3 different powders and tells him that very time he is supposed to mix 3 mg of white powder, 2 mg of red and 4 mg of green, combine them and then take them with glass of water. On other hand doctor Smith gives a patient a simple 'Capsule' that contains the same amount of medicines. But now its not botheration to patient to know what is actually inside the capsule or go through the hassle of measuring the content. So using a 'Capsule' made it really convenient to end user (here patient) in similar way, when writing a class, if you expose how you are storing data, which data structure you are using to end user (here end user is the class that uses your class), then it is just unnecessary details your are flooding the end user with. You should give him simple way to use your class without exposing the complex details.

[@prashantjha654]

where do u live Sir, I want tution from you

[@brianlaudrupchannel]

so whats encapsulation mean? :(

[@cartoonforkids7510]

should i learn java or python

[@suryateja7525]

Cartoon for kids, if you are good at java, learning python won't be a big deal, so start with java, then learn python too

[@akashgupta6974]

last line Mai sop(obj.getI()); hoga Ni to cannot find symbol aye ga .......

[@niitnh7683]

some real time example for encapuslation???

[@ikramasharfi5047]

pls add program for automorphic no. in java

[@Chandral]

Please turn off auto-focus

[@merryz091]

outstanding everything in all lectures.............

[@chaitanyayarramsetti7336]

sir please make another video on encapsulation

[@AshiksTechVlog]

video isn't clear

[@brianlaudrupchannel]

Why is HD 1080 look awful in your video?

[@ismaelahumada929]

+billyblackburn87 clearly just bad camera focus.

[@SHUBHAMSINGH-mi7qf]

sir video quality is not good.......even in hd

[@subodhsharma5928]

Excellent lectures -it makes concept very clear -provide lectures on coding

[@thanualekhya4413]

please provide more lectures on coding part

[@aarushigupta1106]

sir if private variables can be modified out side the class though through methods indirectly then how does encàpsulation provide security or whats it use?

[@faisalchaudhary311]

+Aarushi Gupta In Encapsulation, Public methods can access/modify only those private variable which are define in the public method and rest of the private variables are not accessible/can't be modified by public methods. This is how encapsulation provides security and it depends how you use Setter/ Getter methods.

[@khadijafatima271]

Pl make a clear video

[@m.alshammari2305]

()Great Job Dude, but you should put Obj.getI

[@vaishnavibhavsar1849]

Thank u sir😊

[@thinkingdev102]

In all the codes I have never seen you using 'this' keyword? Is it not mandatory? I really don't know where to use and where not to.

[@chiragkini]

wanted to refer to current intances like use this when u have ambiquity with names For eg: public Class Example{ private int x; public void setX(int x){ this.x=x; // here this.x is member variable. } }

[@thinkingdev102]

Thanks Chirag.

[@manishsinghrawat6879]

The content of this video is too good. Well done sir👍

[@Shifan76]

Hi, above code throws me an error, can anyone help me? thanks! class A { private int i; public void setI(int j) { i=j; } public int getI() { return i; } } class MainClass { public static void main() { A obj=new A(); obj.setI(5); System.out.println(obj.getI()); } }

[@rishabhsharma667]

You are making mistake in main method.Main method syntax is Public static void main(String args[ ])

[@Shifan76]

Hey, thank you so much dude, i have made a mistake in the main method syntax, now it works.

[@saishmhatrearts]

awesome explaning in all videos

[@sureshkone4864]

excellent tutorial and thank u

[@unknown65549]

Something wrong in the main() ! This Statement Should be like; System.out.println(obj.getI());

[@chitrakurupati8196]

Correct

[@NirajPRoxx]

You are amazing, you making it so easy to understand. Thank you sir.

[@dogfish9965]

great lesson. Easy to understand

[@deograciousngereza4883]

waoow i think everybody got it well , congratulations bro

[@sagarroy6649]

video quality is poor

[@kamalpandey4807]

Sir video is not clear

[@ashwanikumarkumar7119]

The best explaination

[@sherothkar5809]

Max effort never waste keep going. sir!

[@pemawangyal9231]

Explanation is so clear and plain. Thank you Sir