What is Encapsulation in Java - OOP Concept

Learn:
Encapsulation in Java
Binding Data with Method
Getters and Setters
Data Hiding

Important notes:
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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[srinivasbadhamoni]

Thank you Naveen, great explanation :)

[jiteshsharma]

awesome.... keep it up... make more videos on Java oops concepts... And core Java part...more demand from " Pune Maharashtra ".. Thank you so much

[rushhour]

I was never successful in finding a tutorial that talks about what happens if the encapsulation is not done. Nobody has been able to give an example of how exactly a bad guy can create problems if the encapsulation is missed out.

[mr.nobody]

Hey Naveen, could you please explain the actual difference between Encapsulation and Abstraction.

[mohitgupta]

Hi Naveen, thanks for the explanation. The Getters and Setters are defined outside main but inside the class however can we create the Getters and Setters in another class to access the private instance variables of this class.

[nalinaksheepanda]

Hi Naveen, Can you please make one more video on Lambda concept introduced in Java 8.

[ILuvBilli]

But what is the advantage of encapsulation here? We can change the value of data member by setter method.

[shehenazshaik]

can you please tell me is class variable and instance variable same?

[kalyanijoshi]

hi naveen please post how to convert csv to json

[saurabh_mahurkar]

If I can access private variables by using getter and setter methods then it is contradicting the whole purpose of encapsulation. You cannot access private variables by creating object of that class but you can access those variables by using getter and setter. Will you please elaborate on this?

[jyotibaviskar]

Hey Navin,
Can you make video on how these oops concept are used in framework. If it's already there please provide the link.. I have searched it in your videos I didn't get it. I am planning to resume my career after maternity. I have 2 years of gap.. It will e great help if you tell me from where to starts which playlist to follow. I have total 4.5 yrs of experience in automation and functional testinfg. But due to gap it's quite difficult to get into market again. I need help.

[skyleenkariuki]

thank you from africa i have an exam thank u u saved me alot of reading lol

[vishwanathanbala]

@Naveen - Just wanted to understand how this approach of declaring class variables as "private" and calling them via getters and setters is different from having a constructor(int ssn, String empName, int empAge) to initialize these class level private variables while creating the object of the class ? - could reduce the lines of code in that case. Also was able to directly get them via objReference.variableName

[soundaryasoudi]

Hi Naveen, Thanks for your video..To protect some fields, we are declaring them as private.. But with the help of getter and setter, we can access those as well right? Then what is the actual use of it.. Can you please tell me?

[parthjangid]

in real time, we only declare data members as private or we also initialize it ? and is that another reason for data hiding is that if any one wants to reuse the code so they can use it without harming the existing code ?

[SanjayKumar-zxdv]

if outside person can get the value then where is the security mechanism in encapsulation.

[mohitsingla]

If outside user of the class is able to change the private variables values through getter and setter methods
Then what is the seecurity point here?

[mayurpatil]

emp.setEmpAge(27);
emp.empAge = 30; what is difference between this two?

[pardhasaradhinaidu]

dear my brother tell me slowly man.Thankyou