doubt in java basics

[vishwa raj]

Hi All,

I have following doubts

1)Is Java pure Object Orinted Programme? I think no because java as only
Pass by value am i correct.

2) say A is a class then A o=new A(); left hand side is called refrence type,right hand side is called Instance type or Object type so then does it mean to say Instance and Object are synonymes.

Thanks

[vishwa raj]

can any body through some light on this

Thanks

[Burkhard Hassel]

Howdy Vishwa!

1) No, java is not purely object oriented. But I don't think this has anything to do with pass by value. It is not fully object oriented because it has also the primitive types that are no objects. int values don't have methods for example.

2) I would say that "instance" and "object" can be used as synonymes. But maybe there are differences in the exact definition. But I simply don't care about this. Perhaps consult wikipedia.


Yours,
Bu.

[Jesper de Jong]

An object is an instance of a class. So yes, "object" and "instance" are essentially the same thing.

[Nageswar Kakolla]

Howdy,

Java is indeed Object-Oriented Programming language is based on following,

Any Problem can be programmed using Objects(Classes in Java sense) and it supports following features of OOP

- Reusability through Inheritence
- Encapsulation through Classes
- Instantiation of Classes
- Polymorphism

Based on above principles C++, Java are called Object-Oriented Programming langauage rather than Object Langauage. I believe Smalltalk is one such pure Object Language.

..Buddy