No, Java is not considered a 100% object-oriented programming language. Although Java strongly supports Object-Oriented Programming concepts such as Encapsulation, Inheritance, Polymorphism, and Abstraction, it also includes primitive data types that are not objects.
Key Points: • Java supports all major OOP principles and encourages object-oriented design. • Primitive data types such as int, char, boolean, double, and float are not objects. • Static methods and static variables can be accessed without creating objects. • Java provides wrapper classes such as Integer, Character, and Double to represent primitive values as objects. • Because not everything in Java is treated as an object, it is not classified as a pure object-oriented language.
Example: The variable below is a primitive type and not an object:
int age = 25;
In contrast, the following uses a wrapper class, which is an object:
Integer age = 25;
Interview Tip: A concise interview answer is:
"No, Java is not a 100% object-oriented language because it supports primitive data types such as int, char, and boolean, which are not objects. A pure object-oriented language treats everything as an object."