Advanced

Master advanced Java 21: reflection internals, virtual threads, cryptography, NIO, ForkJoin, sealed ADTs, annotation frameworks, and capstone production service design.

Prerequisites: Complete Java Practitioner before starting Advanced labs.

Quick Start

🐳 Docker (Recommended)

docker pull zchencow/innozverse-java:latest
docker run --rm zchencow/innozverse-java:latest java --version

🐧 Linux / macOS

🪟 Windows

Labs

Lab 01 Dynamic Proxies

Proxy.newProxyInstance, MethodHandles, type tokens

Lab 02 Virtual Threads

Executors.newVirtualThreadPerTaskExecutor, pinning

Lab 03 Advanced Generics

ImmutableList, PECS wildcards, type erasure

Lab 04 Design Patterns

Decorator, Chain of Responsibility, Visitor, Template

Lab 05 Advanced JDBC

Window functions, CTEs, upsert, JSON extract

Lab 06 Cryptography

SHA-256, HMAC, AES-256-GCM, RSA, SecureRandom

Lab 07 NIO Channels

ByteBuffer, FileChannel scatter/gather, MappedByteBuffer

Lab 08 ForkJoinPool

RecursiveTask, RecursiveAction, work stealing

Lab 09 Serialization

ObjectOutputStream, binary protocol, GZIP

Lab 10 Performance

String, collections, stream vs loop, memoization

Lab 11 Advanced Concurrency

Semaphore, ReadWriteLock, BlockingQueue, Phaser

Lab 12 Annotation Frameworks

@RestController/@GetMapping runtime scanner

Lab 13 Records & Sealed

Compact constructor, withers, sealed ADTs, deconstruction

Lab 14 Text Blocks

Text blocks, String.formatted, regex named groups

Lab 15 🏆 Capstone

Production order service — all techniques combined