Java Concurrency & Multithreading Complete Course

Explore atomic variables that replace volatile counters with lock-free, thread-safe operations. Learn atomic types and methods like increment and get, get and increment, set, and compare and set, ABA problem.

Master Java concurrency concepts, including thread creation, join, interrupt, and daemon threads. Learn synchronization with the synchronized keyword, data races, volatile and atomic variables, wait/notify, producer-consumer patterns, and thread-local data.

Demonstrates data race: two threads increment a shared counter without synchronization, producing unpredictable results; introduce a shared lock and synchronized access to ensure correct values under heavy load.

Demonstrates race condition in a concurrent java environment and uses a volatile flag, a synchronized block, and a double-check to avoid loading already loaded data.

Starvation occurs when a thread cannot regularly access a shared resource due to long synchronized calls causing lock contention, with profiling from Java Mission Control identifying blocked threads.

Master multithreading by splitting work across threads and cores for higher throughput and responsiveness, using synchronized, volatile, and atomic constructs and wait/notify to avoid data races and livelock.

Explore how to use java.util.concurrent locks, including lock, unlock, tryLock, and lockInterruptible, with a re-entrant lock implementation and fairness considerations.

This lecture explains how a semaphore coordinates access to limited resources by tracking permits, such as processor cores, using acquire and release, with fairness and optional try or drain methods.

Demonstrates copy-on-write collections, including copy-on-write array list and copy-on-write array set, showing safe reads with internal synchronization, and expensive updates with unsupported iterator remove.

Explore the concurrent map interface and its java.util.concurrent implementations, including the concurrent hash map, to enable thread-safe, atomic updates for subscription contexts without external synchronization.

Explore the executor service in java.util.concurrent, learn to replace direct thread management with fixed, single, cached, and scheduled pools, and work with runnable and callable tasks and futures and shutdown.

Explore scheduling tasks after a delay or periodically with Java timer and the scheduled thread pool executor, covering timer task, daemon flag, cancellation, and future.

Explore the Java Stream API and parallel streams to process collections, map, filter, and collect, then compute max, min, and count with optional results.

Explore how throughput and latency shape performance in multi-threaded applications, using a producer-consumer example, atomic counters, and percentile-based latency measurements.

Explore testing in a java concurrency context, from unit tests for single methods to thread safety verification with barriers and latches, then stress and performance testing for real-world load.