Struggling to understand wait() and notify() in Java?
In this video, we break down one of the most important multithreading concepts in a simple and practical way.
You’ll learn how threads communicate using wait(), notify(), and notifyAll(), and how this is applied in the Producer–Consumer problem.
📚 What You’ll Learn
➡️ What is wait() in Java
➡️ What is notify() and notifyAll()
➡️ How thread communication works internally
Producer–Consumer: 3 Approaches Explained
1️⃣ Manual Way (wait & notify)
➡️ Using synchronized, wait(), notify()
➡️ Full control over thread communication
➡️ Important for understanding core concepts
❗ Complex and error-prone
2️⃣ Using Executor Service + BlockingQueue
➡️ Thread management handled by ExecutorService
➡️ Synchronization handled by BlockingQueue
➡️ Cleaner, scalable, and production-ready
✔️ Best for real-world systems
3️⃣ Using ArrayBlockingQueue (Simplest & Best)
➡️ Built-in thread safety (no manual sync needed)
➡️ Producer uses put() → waits automatically if full
➡️ Consumer uses take() → waits automatically if empty
✔️ Simple, efficient, and highly recommended
