Java Learning Hub

Master Java from Basics to AI — structured, practical, and real-world focused

public class LearningHub {
    public static void main(String[] args) {
        System.out.println("Welcome to Java!");
    }
}

Learning Modules

Java Basics

Beginner

Start your Java journey with fundamentals — variables, data types, control flow, methods, arrays, and exception handling.

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Object-Oriented Programming

Intermediate

Master OOP design — classes, inheritance, polymorphism, encapsulation, abstraction, interfaces, and enums.

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Data Structures & Algorithms

Intermediate – Advanced

Ace coding interviews — arrays, linked lists, trees, graphs, sorting, DP, and LeetCode practice problems.

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Java Backend Development

Advanced

Build production-ready REST APIs with Spring Boot, JPA, security, testing, and Docker deployment.

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Spring AI & Agentic Systems

Advanced

The future — AI-powered Java applications with Spring AI, LangChain4j, RAG systems, and multi-agent architectures.

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CS Fundamentals

Intermediate

Core theory every developer needs — Operating Systems, Computer Networks, DBMS — with Java integration.

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DevOps

Intermediate

Linux, YAML configs, Docker, CI/CD, Kubernetes basics, and monitoring — integrated with Java apps.

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InterviewKick

All Levels

Curated interview Q&A from big tech — Java, DSA patterns, System Design, Spring Boot, DBMS, and behavioral.

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Recommended Learning Path

1

Java Basics

2-3 weeks

→
2

OOP Concepts

3-4 weeks

→
3

DSA Practice

Ongoing

→
4

Backend Dev

4-6 weeks

→
5

AI & Agents

2-4 weeks

9

Learning Modules

100+

Topics Covered

200+

Code Examples

100%

Open Source

Ready to Start Your Java Journey?

Pick a module above and begin learning today. No prerequisites needed — just curiosity!

Start with Java Basics Contribute on GitHub