Multithreading & Concurrency Learning in Java

All my learnings, notes, and implementations around Multithreading & Concurrency in Java 🚀

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📚 About This Repository

This repository is a comprehensive collection of my explorations and hands-on implementations of multithreading and concurrency concepts in Java. It includes code samples, theoretical notes, best practices, common pitfalls, and advanced topics.

Whether you are a beginner or brushing up on concurrency, you'll find practical examples and explanations here!

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Table of Contents

1. Core Multithreading Concepts
2. Executor Service
3. Practice Questions
4. Concurrent Collections
5. Thread Synchronization Demos
6. Build & Run Instructions
7. Contributing & License

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Core Multithreading Concepts

Explore the fundamental building blocks of multithreading in Java, including thread creation, coordination, computation, and thread properties.

• Creating Threads
  • ExtendsThreadClass.java: Creating threads by extending the Thread class.
  • RunnableThreadExample.java: Implementing threads using the Runnable interface.
• Thread Coordination
  • JoinThreadExample.java: Using join() for thread coordination.
  • WaitAndNotify.java: Inter-thread communication using wait() and notify().
  • ProducerConsumer.java: Classic producer-consumer problem demo.
• Thread Priorities & Daemon Threads
  • ThreadPriority.java: Working with thread priorities.
  • DaemonUser.java: Demonstrating daemon threads.
• Computation with Threads
  • AdderSubtractor.java: Performing arithmetic with threads.
  • PrimeNumberUsingThreads.java: Calculating primes using threads.

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Executor Service

Learn how to manage thread pools and advanced asynchronous tasks using Java's ExecutorService framework.

• FixedThreadPoolDemo.java: Using a fixed thread pool.
• CachedThreadPoolDemo.java: Using a cached thread pool.
• SingleThreadExecutor.java: Single-threaded executor.
• ScheduledExecutorDemo.java: Scheduling tasks.
• CallableDemo.java: Using Callable and Future for async computation.
• CPU_IntensiveTask.java: Handling CPU-intensive tasks.
• CountSum100.java: Summation tasks with thread pools.

Browse all ExecutorService examples »

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Practice Questions

Sharpen your skills with hands-on problems and coding exercises related to thread communication and synchronization.

• OddEven.java: Odd/even number threading problem.
• Print1to10.java: Printing numbers with threads.
• ProducerConsumer.java: Producer-consumer exercise.
• SumTo100.java: Summing numbers using threads.
• ThreadABC.java: Ordered execution of threads A, B, C.

See more practice problems »

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Concurrent Collections

Discover how to use thread-safe collections and synchronization mechanisms for managing shared resources.

• BlockingQueueDemo.java: Using BlockingQueue for producer-consumer scenarios.
• CountDown.java: Synchronization with CountDownLatch/related constructs.
• SynchronizedCollection.java: Using synchronized collections in Java.

All concurrent collection demos »

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Thread Synchronization Demos

Explore different synchronization techniques and locking mechanisms.

• LockWithCustomVar.java: Custom lock implementation.
• PrintNums1to100.java: Synchronized number printing.
• SynchronizationDemo.java: Demonstration of basic synchronization.

Browse thread synchronization demos »

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🚦 Getting Started

To browse or run the code examples:

1. Clone this repository:

   git clone https://github.com/Dibyo10/Multithreading_Concurrency_Learning.git

2. Open in your favorite Java IDE (IntelliJ IDEA, Eclipse, VSCode, etc.).
3. Run the example files as standard Java applications.

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▶️ How to Run

• Each directory contains self-contained Java files with a main method.
• Compile and run with:

  javac path/to/File.java
  java path.to.File

• Or run directly from your IDE.

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🌟 Useful Resources

• Official Java Concurrency Documentation
• Java Concurrency in Practice
• Baeldung - Guide to Java Concurrency

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🤝 Contributing

Contributions, suggestions, and doubts are welcome!
Feel free to open issues or pull requests.

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