Implementing Producer Consumer using BlockingQueue, Locks/Conditions and Wait-Notify. Important: The last part about using wait-notify is incorrect. My mistake, sorry about that. The object used to wait/notify should be the same object used by threads to synchronize (to avoid IllegalMonitorStateException). So correct code should be similar to: synchronize(sharedQ){ sharedQ.wait(); } synchronize(sharedQ){ sharedQ.notifyAll(); } That was a basic mistake which I should have caught. I feel bad about misleading the initial viewers. Sorry. Channel ---------------------------------- Master difficult programming concepts in few minutes. I try to explain difficult concepts like Java concurrency in simple to understand manner. Explore videos on topics like Spring Boot, Cloud Foundry, Java 8 and more. I am happy to clarify your doubts. Ask me anything in the comments. Also happy to take requests for new videos. New video added every Sunday. Subscribe or explore the channel - http://bit.ly/defog_tech Current Playlists ---------------------------------- Java Executor Service - http://bit.ly/exec_srvc Java Concurrency - http://bit.ly/java_crncy Spring Boot 2.0 - http://bit.ly/spr_boot2 Java 8 - http://bit.ly/java_8-11 Intellij IDEA Shortcuts - http://bit.ly/i_idea Popular Videos ---------------------------------- Executor Service - https://www.youtube.com/watch?v=6Oo-9Can3H8 Introduction to CompletableFuture - https://www.youtube.com/watch?v=ImtZgX1nmr8 Understand how ForkJoinPool works - https://www.youtube.com/watch?v=5wgZYyvIVJk Java Memory Model in 10 minutes - https://www.youtube.com/watch?v=Z4hMFBvCDV4 Volatile vs Atomic - https://www.youtube.com/watch?v=WH5UvQJizH0 What is Spring Webflux - https://www.youtube.com/watch?v=M3jNn3HMeWg