What is Java? OOP (4 pillars): Primitive and Non-Primitive Types in java.

Java is a versatile programming language with widespread applications in crafting Android apps, web applications, and various software development tools. At its core, Java embraces the principles of Object-Oriented Programming (OOP), characterized by four foundational pillars: Abstraction, Polymorphism, Encapsulation, and Inheritance.
Abstraction-involves simplifying complex systems by modeling classes based on the essential properties, shortly said it shows required information and ignores unnecessary details.
Polymorphism-means "many forms", it allows objects of different classes to be treated as objects of a common-based class.
Encapsulation-restricts access to some of an object’s components and prevents accidental data modification.
Inheritance-is a mechanism that allows a new class to inherit the properties and behaviors of an existing class.
In data types, Java encompasses two tracks: Primitive and Non-primitive. Primitive types, including int, byte, short, long, float, double, boolean, and char, represent the fundamental building blocks of the language. On the other hand, Non-primitive data types, often termed reference types, point to objects and are crafted by the programmer. These non-primitive types encompass Array, Class, String, and "Interface," contributing to the language's adaptability and extensibility.