Java Concurrency Curriculum

Course contents

Java 21 · Interview to Production

Concurrency Curriculum

Learn to identify invariants, prove correctness, choose Java primitives, manage execution, and carry the same reasoning across database and distributed boundaries.

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Module 1

Reasoning Foundations

6 lessons6 core

Build the mental model used throughout the course: reason about tasks, interleavings, shared invariants, correctness, and progress before choosing an API.

Concurrency, Parallelism, and Async · Core Processes, Threads, and Tasks · Core Scheduling and Interleavings · Core Shared State, Invariants, and Races · Core+2 more

Module 2

Java Memory Model

6 lessons5 core1 advanced

Understand atomicity, visibility, ordering, happens-before, publication, and the guarantees behind Java synchronization tools.

Atomicity, Visibility, and Ordering · Core Happens-Before · Core synchronized and Intrinsic Monitors · Core volatile: Visibility Without Mutual Exclusion · Core+2 more

Module 3

Locks and Coordination

6 lessons5 core1 advanced

Choose and use Java locks, conditions, permits, gates, barriers, and cancellation protocols according to the relationship between tasks.

ReentrantLock and Lock Selection · Core Condition Queues: wait, notifyAll, and Condition · Core Semaphores and Bounded Concurrency · Core Latches, Barriers, and Phasers · Core+2 more

Module 4

Tasks, Executors, and Modern Java

8 lessons6 core2 advanced

Manage task execution, capacity, results, failures, scheduling, parallel computation, virtual threads, and structured lifecycles.

The Executor Model and Lifecycle · Core ThreadPoolExecutor Anatomy · Core Backpressure, Rejection, and Bulkheads · Core Callable, Future, and Cancellation · Core+4 more

Module 5

Coding Problems

5 lessons

Java-first concurrency exercises with progressive hints, rigorous solutions, and explicit safety and liveness reasoning.

Beginner

Print in Order Alternate Foo and Bar Linearizable Concurrent Counter

Intermediate

Zero, Even, Odd Reusable Countdown Latch

Module 6

Concurrent Collections and Patterns

6 lessons4 core2 advanced

Choose collections by operation semantics, transfer ownership through queues, and reduce contention through snapshots, partitioning, and coordinated caching.

Choosing a Concurrent Collection · Core ConcurrentHashMap and Atomic Map Operations · Core BlockingQueue and Producer-Consumer · Core Read-Mostly State and Snapshots · Core+2 more

Module 7

Design, Testing, and Diagnostics

6 lessons5 core1 advanced

Turn primitives into reviewable components, measure the right bottleneck, test hostile schedules, benchmark honestly, and diagnose production contention.

Designing a Thread-Safe Component · Core Lock Scope, Composition, and Open Calls · Core Contention, Throughput, and Latency · Core Testing Concurrent Code · Core+2 more

Module 8

Database and Distributed Concurrency

6 lessons4 core2 advanced

Carry concurrency reasoning across process boundaries using transactions, constraints, idempotency, leases, fencing, and an honest coordination decision framework.

Where JVM Synchronization Stops · Core Transactions, Isolation, and Anomalies · Core Optimistic, Pessimistic, and Constraint-Based Control · Core Idempotency, Deduplication, and Work Claiming · Core+2 more