Java learning path

Learn Java in the right order.

Start with the essentials, move through short lessons, and work toward backend-ready Java without hopping between random topics.

Start at module 1 Open first lesson

Modules: 19
Lessons: 115
Pacing: Self-paced

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Course roadmap

Browse the modules in order.

Beginner

7 modules in this stage

Foundations first.

Beginner · 01

6 lessons

Module 1: Getting Started with Java

A deep dive into the absolute basics: understanding the Java ecosystem, setting up your environment, and compiling and running your first program with confidence.

Starts with: Java Ecosystem Deep Dive: JDK, JRE, and JVM Architecture
Ends with: Troubleshooting: Common First-Time Errors

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Beginner · 02

3 lessons

Module 2: Variables, Data Types, and Operators

The fundamental building blocks for storing information and performing calculations in Java.

Starts with: Primitive Data Types and Variables
Ends with: Type Conversion and Casting

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Beginner · 03

2 lessons

Module 3: Control Flow and Decision Making

Directing the flow of your program's execution using conditional statements and loops to make intelligent decisions.

Starts with: Conditional Logic: If, Else If, and Else Statements
Ends with: Iteration: For, While, and Do-While Loops

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Beginner · 04

4 lessons

Module 4: Methods and Code Reusability

Structuring your program into reusable functions, understanding how data is passed, and mastering the call stack.

Starts with: Defining and Calling Methods
Ends with: The Call Stack Explained

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Beginner · 05

4 lessons

Module 5: Object-Oriented Programming (OOP) Fundamentals

The cornerstone of Java. Learn to think in terms of objects, classes, and the four pillars of OOP: Encapsulation, Inheritance, Polymorphism, and Abstraction.

Starts with: Introduction to OOP Concepts
Ends with: Encapsulation and Access Modifiers

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Beginner · 06

5 lessons

Module 6: Inheritance and Polymorphism

Master code reuse with inheritance and create flexible systems with polymorphism. Learn about superclasses, subclasses, method overriding, abstract classes, and interfaces.

Starts with: Inheritance Basics: The `extends` Keyword
Ends with: Interfaces

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Beginner · 07

3 lessons

Module 7: Arrays and the Collections Framework

Learn to store and manage groups of objects using fixed-size arrays and the powerful, flexible Java Collections Framework, including Lists, Sets, and Maps.

Starts with: Working with Arrays
Ends with: The Collections Framework: An Overview

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Intermediate

7 modules in this stage

Core APIs, debugging, and backend-ready patterns.

Intermediate · 01

11 lessons

Module 7: Advanced Object-Oriented Concepts

Go beyond the basics of classes by mastering deep inheritance hierarchies, advanced polymorphism, and interface-driven design.

Starts with: Designing Robust Inheritance Hierarchies
Ends with: Mini-Project: Shape Hierarchy

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Intermediate · 02

8 lessons

Module 8: Exception Handling and Debugging

Handle errors gracefully, design custom exceptions, and adopt professional debugging techniques.

Starts with: Exception Hierarchy & Categories
Ends with: Mini-Project: Resilient File Reader

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Intermediate · 03

9 lessons

Module 9: Advanced Core Features

Strengthen mastery of strings, regular expressions, file I/O, NIO.2, and Optional-driven APIs.

Starts with: String Pool & Memory Management
Ends with: Mini-Project: Log File Analyzer

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Intermediate · 04

9 lessons

Module 10: Functional Programming and Streams

Adopt functional idioms with lambdas, method references, and the Streams API for expressive data processing.

Starts with: Lambda Syntax Variations
Ends with: Mini-Project: Data Analysis with Streams

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Intermediate · 05

9 lessons

Module 11: Collections Framework Deep Dive

Go beyond lists with sets, maps, queues, comparators, and utility classes.

Starts with: Collections Hierarchy Overview
Ends with: Mini-Project: Contact Management System

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Intermediate · 06

7 lessons

Module 12: Generics and Type Safety

Parameterize types for reusable, type-safe APIs across collections and custom data structures.

Starts with: Why Generics?
Ends with: Mini-Project: Generic Data Structure

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Intermediate · 07

5 lessons

Module 13: Enums and Annotations

Use enums to model finite states and annotations to add metadata-driven behavior.

Starts with: Enum Fundamentals
Ends with: Mini-Project: Enum-Powered State Machine

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Advanced

5 modules in this stage

Concurrency, databases, Spring Boot, and capstones.

Advanced · 01

7 lessons

Module 14: Concurrency and Multithreading

Write thread-safe Java code using executors, synchronization primitives, and CompletableFuture.

Starts with: Thread Lifecycle & Runnable vs Callable
Ends with: Mini-Project: Concurrent Download Manager

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Advanced · 02

6 lessons

Module 15: Database Access

Connect to relational databases using JDBC, manage transactions, and explore JPA/Hibernate basics.

Starts with: JDBC Fundamentals
Ends with: Mini-Project: Simple CRUD Service

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Advanced · 03

6 lessons

Module 16: Spring Boot Essentials

Bootstrap production-ready services with Spring Boot, dependency injection, and Spring Data.

Starts with: Spring IoC & Dependency Injection
Ends with: Mini-Project: Task Management API

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Advanced · 04

6 lessons

Module 17: Professional Development Practices

Adopt testing, build automation, containerization, and CI/CD workflows used in production teams.

Starts with: Unit Testing with JUnit 5
Ends with: Mini-Project: Tested & Containerized Service

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Advanced · 05

5 lessons

Module 18: Final Capstone Projects

Apply every skill in curated capstones covering CLI apps, data pipelines, concurrency, and REST services.

Starts with: Capstone 1: Console Library Manager
Ends with: Capstone 5: End-to-End Application

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