Introduction
Java is a widely used programming language that is crucial in developing a wide range of applications. Java is divided into two main categories: Core Java and Advanced Java. Core Java talks about the basics of this language, which provides the essential building blocks and concepts that every Java developer should learn. It teaches the fundamental syntax, data types, variables, control structures, and object-oriented programming principles. On the other hand, Advanced Java builds upon these core concepts and discusses more sophisticated features and tools. It helps developers to create complex, enterprise-level applications by using frameworks, libraries, and advanced technologies. Advanced Java covers topics like web development, database connectivity, multithreading, networking, and more.

In this article, we will learn the main differences between Core Java & Advanced Java, which will eventually help you understand their specific roles in the Java ecosystem.
Core Java
Core Java is the fundamental part of the Java programming language. It provides the basic building blocks and concepts that every Java developer has to learn if they are thinking of being a developer. Let's discuss the important features and components of Core Java in detail:
1. Object-Oriented Programming (OOP): Core Java is built on the principles of object-oriented programming. It has concepts like classes, objects, inheritance, polymorphism, and encapsulation. These concepts allow developers to create modular, reusable, and maintainable code.
2. Data Types and Variables: Core Java provides a range of data types, including primitive types (such as int, float, boolean) and reference types (such as objects and arrays). Variables store and manipulate data throughout the program.
3. Control Structures: Core Java has control structures like if-else statements, switch statements, and loops (for, while, do-while). These structures enable developers to control the program's flow based on certain conditions or iterations.
4. Exception Handling: Core Java provides a robust exception handling mechanism. Exceptions are used to properly handle runtime errors and exceptional conditions. Developers can use try-catch blocks and throw statements to handle and propagate exceptions effectively.
5. Input/Output Operations: Core Java comprises classes and methods for performing input and output operations. The java.io package provides classes for reading from and writing to files, handling streams, and working with input/output devices.
6. Multithreading: Core Java supports multithreading, which allows multiple threads to execute concurrently within a single program. This enables developers to create responsive and efficient applications that can perform multiple tasks simultaneously.
7. Collections Framework: Core Java consists of the Collections Framework, which provides a set of reusable data structures and algorithms. It has classes like ArrayList, LinkedList, HashSet, and HashMap, which help in efficient data storage and manipulation.