Java Mastery
Comprehensive Java from core OOP through concurrency, streams, modern Java 21 features, and production-ready microservices.
100% Free · All lessons unlocked
Course Content
Foundations
Core concepts and groundwork
Introduction to Java and the JVM Ecosystem
Reading
Variables, Data Types, and Operators
Reading
Control Flow: If-Else, Switch, and Ternary
Reading
Loops: For, While, Do-While, and Enhanced For
Reading
Foundation Practice: Calculator and Number Games
Exercise
Classes, Objects, and Constructors
Reading
Core Skills
Essential techniques and patterns
Encapsulation and Access Modifiers
Reading
Inheritance and Method Overriding
Reading
Polymorphism, Interfaces, and Abstract Classes
Reading
OOP Practice: Building a Banking System
Exercise
Arrays and the Java Collections Framework
Reading
Generics: Type Safety and Wildcards
Reading
Applied Practice
Hands-on, real-world scenarios
Exception Handling and Custom Exceptions
Reading
String Manipulation and Regular Expressions
Reading
Core APIs Assessment and Practice
Exercise
Lambda Expressions and Functional Interfaces
Reading
Streams API: Filter, Map, Reduce
Reading
Optional: Null-Safe Programming
Reading
Advanced Topics
Deeper, more complex material
Method References and Composing Functions
Reading
Mid-Course Project: E-Commerce Product Catalog
Project
Threads, Runnable, and the Executor Framework
Reading
Synchronization, Locks, and Concurrent Collections
Reading
CompletableFuture and Async Programming
Reading
Java 21 Virtual Threads and Structured Concurrency
Reading
Production & Scale
Building for the real world
Concurrency Practice: Multi-threaded Data Processor
Exercise
I/O Streams, NIO.2, and File Handling
Reading
The Java Module System (JPMS)
Reading
Records, Sealed Classes, and Pattern Matching
Reading
JVM Internals: Memory Model and Garbage Collection
Reading
Modern Java Features Practice: Match Event Processor
Exercise
Mastery & Capstone
Projects and final review
100% Free · All lessons unlocked
Topic Overview
What you'll learn
- Core concepts and fundamentals of Java Mastery
- Industry best practices and design patterns
- Hands-on exercises with real-world scenarios
- Performance optimization and advanced techniques
- Building production-ready applications