What are Encapsulation, Polymorphism and Inheritance?
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Answer Posted / sivadasan
I. Encapsulation - Hiding the implementation details of a
Class. Once a class is Encapsulated then we Cannot directly
access that class members. We can achieve encapsulation
like the following,
Eg: public class <class Name> {
private <member_1>;
private <member_2>;
}
In the above example members of the public class declared
as private. So any other class members cannot directly
access the members of that class, and those are stored as a
Single Unit. That is Encapsilation.
Real Time Example - Medical Capsule (Different medicines
packed as in single Capsule)
II. Polymorphism - Ability to process an Object differently
depending upon thier Data Type or Class.
In simple words, One function - different implementations.
There two types of Polymorphism :
1) Compile time Polymorphism - The compiler know that the
way of execution of the program , means - which method
have to be invoked at compilation time. It is achieved by
Method Overloading - Same method name, may be different
parameters, may be different data type, may be different
return type. Method Overloading perform only inside of the
class.
2) Run-Time Polymorphism - The compiler doesn't know the
way of execution of the program. It will take the decision
for execute the program at Run-Time. It is achieved by
Method Overriding - Same Method name, same signatures,
similar DataType, Return type also should be the same.
Method Overriding perform at Subclass.
Real time Example - A man perform multiple role.
He is Employee of his office,He is father of his Childrens,
He is Husband of his wife, He is Son of his Parents.
Inheritance - A class of object can inherit the properties
and methods of an another class of object. Advantage :
reusabilty of code and accessibilty of properties and
methods of derived class by subclass.
Real Time example - Father - Son Relationship.
I hope you will get idea about all those things.
If any issue let me know imm'tly.
Regards,
S.Sivadasan
Coromandel Infotech India Ltd.,
sivadasan.s@c2il.com
Chennai.
| Is This Answer Correct ? | 46 Yes | 3 No |
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