Why is java called "purely" object oriented language ?

Solution : -
               Java is NOT a purely Object Oriented Language because given following step below : -
                   1. Not all pre-defined types in Java (primitives) are objects.
                   2. Static variables can be used without creating an instance of an object.
                   3. Overriding a static method / variable isn’t possible.
                   4. Operations on objects should only be done through methods

                       exposed by the object which   isn’t entirely true in Java .

                      Example : - “Foo” + “Bar”