In this Java tutorial, we implement the Producer–Consumer problem using a BlockingQueue and the Poison Pill technique. 🧵 This program demonstrates multithreading, synchronization, and concurrent collections in Java, making it an essential concept for both beginners and interview preparation. 📌 What you’ll learn in this video: *What is the Producer–Consumer problem? *How to use BlockingQueue in Java for thread-safe communication *Producer thread → generates data *Consumer thread → processes data *Using a Poison Pill to gracefully stop the consumer Real-world use cases of Producer–Consumer pattern. ------------------------------------------------------------------------------------------ 🔹 Key Concepts 1) BlockingQueue (ArrayBlockingQueue size 5) Shared buffer of fixed size 5. put() blocks producer if the queue is full. take() blocks consumer if the queue is empty. 2) Producer Produces integers 1 → 10. After finishing, it inserts a “poison pill” (-1) to signal the consumer to stop. 3) Consumer Consumes numbers from the queue. When it reads -1, it breaks the loop and stops. 4) () differences Producer sleeps 100ms (faster). Consumer sleeps 150ms (slower). This ensures the queue fills up sometimes, showing blocking behavior. ------------------------------------------------------------------------------------------ 🔹 Explanation of Output Flow At start: Producer generates quickly, consumer lags → queue temporarily holds items. Middle: Consumer gradually catches up, consuming from queue. End: Producer sends -1 after last item. Consumer reads all valid numbers (1–10) → then sees -1 → exits loop. Finally, main thread prints “Done”. ***************************************************** If you enjoyed this video, don’t forget to LIKE 👍, COMMENT 💬, and SUBSCRIBE 🔔 for more Java programming tutorials and coding interview questions! #java #multithreading #ProducerConsumer #BlockingQueue #codinginterview #JavaConcurrency #javacode