Complete Java Mastery
Roadmap.
From JVM Internals to building your own Multithreaded Executor. This 8-12 week roadmap covers the "Why" and "How" of production-grade Java engineering.
The Curriculum
PHASE 1: Java Fundamentals
Master the building blocks of Java. Learn how the JVM works, primitive data types, memory limits, and strings.
PHASE 2: Object-Oriented Programming
Go deep into Core Java OOP. Master inheritance, compile-time vs runtime polymorphism, and encapsulation.
PHASE 3: Advanced Core Java
Deep dive into Collections, HashMaps, Generics, Enums, and Exception Handling.
PHASE 4: Java Internals
Learn the JVM, Class Loading, Stack vs Heap, and Garbage Collection (G1, CMS, ZGC).
PHASE 5: Multithreading & Concurrency
Locks, Synchronization, Executor Framework, and Concurrent Collections. Prevent deadlocks and race conditions.
PHASE 6: Java 8+ Features
Lambdas, Streams, Optional, and Functional Interfaces. Modern Java idioms.
PHASE 7: Design Patterns
Singleton, Factory, Builder, Strategy, Observer. Real-world architectural patterns.
PHASE 8: Real-World Java
Logging (SLF4J), Code Review, Error handling, and production-grade code practices.
PHASE 9: Interview Preparation
Core Java tricky questions, equals/hashCode contracts, immutability patterns.
PHASE 10: Mini Projects
Build an LRU Cache, Task Executor, Rate Limiter, and Key-Value Store from scratch.