why java is not pure object oriented language? explain
Java is often described as a "partially" object-oriented programming language rather than a "pure" object-oriented language. This distinction arises from several key characteristics of Java that deviate from the principles of pure object-oriented programming. Here are the main reasons why Java is not considered a pure object-oriented language:
Primitive Data Types:
int
, char
, boolean
, float
, etc.) that are not objects. These primitives are used for performance reasons and are not derived from the Object
class. This means that you can have variables that are not objects, which is contrary to the principles of pure object-oriented programming.Static Methods and Variables:
Non-Object-Oriented Features:
Inheritance from Non-Object Classes:
Object
). While Java does have a root class (Object
), it also allows for the use of interfaces and does not enforce that all types must be derived from a single base class.Null Reference:
null
, which represents the absence of an object. In a pure object-oriented language, every variable should reference an object, and the concept of null
would not exist.Operator Overloading:
In summary, while Java is fundamentally object-oriented and encourages the use of objects and classes, its inclusion of primitive types, static methods, and other procedural features means it does not fully adhere to the principles of pure object-oriented programming.