README.md

Core Java Concepts

This section covers fundamental and advanced Java concepts essential for backend development. It includes detailed explanations, code examples, and best practices for mastering Java programming.

How to Use This Section

• Each topic is organized into its own subdirectory with relevant markdown files and code samples.

• Each markdown file provides clear explanations, diagrams, and code snippets to illustrate key concepts.

• Code examples are included in the codes subdirectory for hands-on practice.

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Topics Covered

1. Core Java Basics

• History of Java

• JDK, JRE, JVM

• JVM Architecture in detail ⭐️

• Overview on how a Java file Runs

• How Float and Double is stored

• Data Types in Java

• Stack and Heap

• static Keyword

• final Keyword

• this vs super Keyword

• Constructors in Java

2. Strings and Memory Management

• Strings in Java

• How Strings are stored

• Mutable Strings in Java

• String Manipulation and Regex

3. Object-Oriented Programming (OOP) Concepts

• Encapsulation in Java

• Inheritance in Java

• Polymorphism in Java

• Abstraction in Java

• Upcasting and Downcasting in Java

• instanceof Operator

4. Interfaces and Abstract Classes

• Abstract Classes

• Static Classes vs Non-Static Classes

• Anonymous Inner Classes

• Interfaces in Java

• Class vs Interface vs Abstract Class

• Annotation in Java

• Functional Interfaces in Java

• Enums in Java

• Lambda Expressions in Java

5. Exception Handling

• Different Types of Errors

• Exception Handling in Java

• Exception Hierarchy in Java

• Checked vs Unchecked Exceptions

• throw vs throws Keyword

• Exception Methods in Java

6. Java Memory Management

• JIT Compiler in Java

• Class Loading in Java

• Memory Management in Java

• Garbage Collection in Java

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Next Steps

Once you finish the Core Java section, you can proceed to the Advance Java Concepts to explore more complex topics like multithreading, concurrency, and collections.

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Contribution

If you find any issues or have suggestions for improvement, please feel free to open an issue or submit a pull request. Your contributions are welcome!

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