Prerequisites
- Solid understanding of Java basics (OOP, collections, exceptions)
- Experience with build tools (Maven/Gradle)
- Basic understanding of design patterns
- Familiarity with testing concepts
Phase 1: Modern Java Features (3-4 weeks)
Pattern Matching
- Type patterns
- Record patterns
- Switch expressions with patterns
- Pattern matching for instanceof
- Sealed classes and patterns
- Exhaustiveness checking
Virtual Threads and Structured Concurrency
- Understanding virtual threads vs platform threads
- Structured concurrency
- Thread scheduling and management
- Migration strategies from traditional threading
- Best practices and patterns
- Performance implications
Records and Sealed Types
- Record patterns and composition
- Pattern matching with records
- Sealed interfaces and classes
- Permits clauses
- Migration strategies
- Design patterns with sealed types
Modern Language Features
- Text blocks
- Enhanced switch expressions
- Helpful NullPointerExceptions
- Foreign Function & Memory API
- Vector API
Phase 2: Advanced Concurrency (4-5 weeks)
Concurrent Collections
- ConcurrentHashMap internals
- Queue implementations
- BlockingQueue variations
- CopyOnWriteArrayList
- Custom concurrent collections
Synchronization Mechanisms
- Locks and conditions
- Semaphores
- CountDownLatch
- CyclicBarrier
- Phaser
- StampedLock
Executors and Thread Pools
- ThreadPoolExecutor internals
- Fork/Join framework
- Work stealing
- Custom thread pool implementations
- Monitoring and tuning
Asynchronous Programming
- CompletableFuture deep dive
- Custom executors
- Reactive programming concepts
- Project Reactor basics
- Integration patterns
Phase 3: Performance Optimization (4-5 weeks)
JVM Internals
- Memory model
- Garbage collection algorithms
- JIT compilation
- Class loading
- Memory leaks detection
- Performance profiling
Memory Management
- Stack vs heap
- Object layout
- Escape analysis
- Memory barriers
- Off-heap memory
- Direct ByteBuffer
Performance Tuning
- JVM flags and tuning
- Garbage collector tuning
- Thread pool tuning
- Connection pool optimization
- Profiling tools mastery
- Benchmarking techniques
Code Optimization
- String pool and interning
- Collection choice optimization
- Algorithm optimization
- Data structure selection
- Cache-friendly code
- Lock-free programming
Phase 4: Advanced Topics (4-5 weeks)
Reflection and Metaprogramming
- Dynamic proxy
- Annotation processing
- Bytecode manipulation
- Custom class loaders
- Runtime code generation
- Java agents
Security
- Security manager
- Cryptography
- SSL/TLS handling
- Secure coding practices
- Security vulnerabilities
- Access control
Testing and Quality
- JUnit 5 advanced features
- Property-based testing
- Mutation testing
- Performance testing
- Load testing
- Security testing
Integration and Monitoring
- JMX deep dive
- Custom metrics
- Monitoring solutions
- Logging best practices
- Tracing solutions
- APM integration
Phase 5: Project Implementation (3-4 weeks)
Project Ideas
- Custom thread pool with monitoring
- Lock-free data structure implementation
- High-performance cache system
- Custom classloader with security
- Reactive event processing system
Advanced Implementation Topics
- Design patterns for concurrency
- Performance optimization patterns
- Security patterns
- Testing patterns
- Monitoring patterns
Practice and Assessment
Hands-on Exercises
- Implementing concurrent data structures
- Writing lock-free algorithms
- Creating custom thread pools
- Building monitoring solutions
- Developing security features
Performance Challenges
- Optimize existing applications
- Solve concurrency puzzles
- Debug memory leaks
- Tune JVM parameters
- Implement benchmarks
Project Milestones
- Design and implement concurrent systems
- Create high-performance solutions
- Build secure applications
- Develop monitoring solutions
- Write comprehensive tests
Learning Resources
Documentation
- JDK documentation
- JEP specifications
- Java Language Specification
- Java Virtual Machine Specification
Books and Papers
- Java Concurrency in Practice
- Optimizing Java
- The Well-Grounded Java Developer
- Research papers on JVM internals
Tools
- JMH (Java Microbenchmark Harness)
- JFR (Java Flight Recorder)
- JMC (Java Mission Control)
- VisualVM
- Async-profiler
Community Resources
- OpenJDK mailing lists
- Java Champions blogs
- Conference talks
- Research papers