What is oops?

Question

hi
can any one tell me what is oops and when we go for abstract calss and when we go for interfaces?
thanks in advance

Answer 1

Modi wrote:
Oops is a object oriented programming. Basically oops concept is using for specify the relation between the class and the object. Its having three features
1.) Encapsulation:- In encapsulation, its binding method and variable in a class. Whatever code in java that is the Encapsulation.
2.) Inheritance:- Inheritance is a process in which subclass extends the property of superclass.
3.)Polymorphism:- Polymorphism means one interface and multiple method. Overloading is the example of polymorphismAnd what about "4) Abstraction"? (And don't say that it falls under encapsulation because it doesn't.)
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When to use an abstract class?: In case where you want to use implementation inheritance then it is
usually provided by an abstract base class. Abstract classes are excellent candidates inside of application frameworks. Abstract classes let you define some default behavior and force subclasses to provide any specific behavior. And what is "implementation inheritance", if the OP asked the question (s)he did, I can guarantee (s)he doesn't know what that is, and so the answer means nothing to him.
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When to use an interface?: For polymorphic interface inheritance, where the client wants to only deal with a type and does not care about the actual implementation use interfaces. If you need to change your design frequently, you should prefer using interface to abstract. CO Coding to an interface reduces coupling and interface inheritance can achieve code reuse with the help of object composition. For example: The Spring framework’s dependency injection promotes code to an interface principle. Java does not support multiple inheritance. Java only supports multiple interface inheritanceRepeat the last question replacing "implementation inheritance" with "polymorphic interface inheritance". And, add the fact that the rest of answer would also have gone completely over the OPs head.