⚡ Java Concurrency Lab

🧵 Advanced Java Multithreading & Concurrency Playground

Professional Java Concurrency Examples • Thread Synchronization • Modern Concurrent Programming

Mastering Java Multithreading through real-world implementations, concurrency patterns, synchronization techniques, asynchronous programming, and high-performance parallel computing.

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📖 Overview

Java Concurrency Lab is a comprehensive educational project demonstrating the most important concepts of Java Multithreading and Concurrent Programming.

The repository contains practical implementations of synchronization mechanisms, concurrent collections, asynchronous programming models, thread pools, atomic operations, and modern concurrency utilities from the Java Standard Library.

This project was developed to strengthen advanced Java backend skills while preparing for enterprise software development and technical interviews.

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✨ Features

🧵 Core Multithreading

• Thread Creation
• Runnable Interface
• Thread Lifecycle
• Thread Priorities
• Daemon Threads
• Thread States
• Thread Communication

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🔒 Synchronization

• synchronized Methods
• synchronized Blocks
• Object Locking
• Class Locking
• Intrinsic Locks
• Monitor Locks

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⚠ Concurrency Problems

• Race Conditions
• Data Inconsistency
• Deadlocks
• Livelocks
• Starvation
• Visibility Problems

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⚡ Modern Concurrency Utilities

• ExecutorService
• ScheduledExecutorService
• Cached Thread Pool
• Fixed Thread Pool
• Single Thread Executor

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🚀 Asynchronous Programming

• Callable
• Future
• CompletableFuture
• Async Pipelines
• Parallel Tasks
• Exception Handling

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🔥 Atomic Programming

• AtomicInteger
• AtomicLong
• AtomicReference
• Compare And Set (CAS)
• Lock-Free Programming

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🛡 Thread Safety

• Immutable Objects
• Thread-safe Collections
• ConcurrentHashMap
• CopyOnWriteArrayList
• BlockingQueue

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⚙ Parallel Processing

• ForkJoin Framework
• RecursiveTask
• RecursiveAction
• Work Stealing Algorithm
• Parallel Computation

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🏛 Design Patterns

• Thread-safe Singleton
• Lazy Initialization
• Double Checked Locking

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📂 Project Structure

src
│
├── basic
│     ├── ThreadCreation
│     ├── RunnableExample
│     ├── ThreadLifecycle
│     └── DaemonThread
│
├── synchronization
│     ├── SynchronizedMethod
│     ├── SynchronizedBlock
│     └── MonitorLock
│
├── concurrency
│     ├── RaceCondition
│     ├── Deadlock
│     ├── Livelock
│     └── VisibilityProblem
│
├── atomic
│     ├── AtomicInteger
│     ├── AtomicReference
│     └── CASExample
│
├── executor
│     ├── FixedThreadPool
│     ├── CachedThreadPool
│     ├── ScheduledExecutor
│     └── CallableFuture
│
├── async
│     ├── CompletableFuture
│     ├── AsyncPipeline
│     └── ParallelExecution
│
├── collections
│     ├── ConcurrentHashMap
│     ├── BlockingQueue
│     └── CopyOnWriteArrayList
│
├── forkjoin
│     ├── RecursiveTask
│     └── RecursiveAction
│
├── immutable
│
└── singleton

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🛠 Technologies

Technology	Purpose
Java 17+	Programming Language
java.util.concurrent	Concurrency Utilities
ExecutorService	Thread Pool
CompletableFuture	Async Programming
Atomic Classes	Lock-Free Programming
ForkJoinPool	Parallel Computing
Concurrent Collections	Thread-safe Data Structures

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🧠 Concepts Demonstrated

✅ Thread Lifecycle

✅ Race Condition

✅ Synchronization

✅ Locks

✅ wait() / notify()

✅ volatile

✅ Atomic Variables

✅ Thread Pool

✅ Future

✅ CompletableFuture

✅ Parallel Programming

✅ Concurrent Collections

✅ ForkJoin Framework

✅ Immutable Objects

✅ Singleton Pattern

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🚀 Getting Started

Clone Repository

git clone https://github.com/your-username/Java-Concurrency-Lab.git

cd Java-Concurrency-Lab

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Compile

javac *.java

or

mvn clean install

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Run Example

Each example contains its own

public static void main(String[] args)

Simply run any class individually to observe the behavior of the concurrency concept.

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🎯 Learning Goals

This repository is designed for

• Java Backend Developers
• Computer Science Students
• Technical Interview Preparation
• Multithreading Practice
• Enterprise Java Development
• Software Engineering Education

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📚 Skills Demonstrated

• Concurrent Programming
• Thread Synchronization
• Parallel Computing
• Lock-Free Algorithms
• Thread-safe Design
• Java Backend Development
• Performance Optimization
• Problem Solving

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💼 Ideal For

✔ GitHub Portfolio

✔ Technical Interviews

✔ University Projects

✔ Java Backend Portfolio

✔ Internship Applications

✔ Software Engineering Showcase

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🌟 Future Improvements

• ReentrantLock Examples
• ReadWriteLock
• Semaphore
• CountDownLatch
• CyclicBarrier
• Phaser
• Virtual Threads (Java 21)
• Structured Concurrency
• Reactive Streams

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👩‍💻 Developer

Dinora Sharipova

Software Engineering Student

Java Backend Developer

Spring Boot • REST APIs • PostgreSQL

Building scalable backend systems with clean architecture and modern Java technologies.

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⭐ Support

If you found this project useful:

⭐ Star this repository

🍴 Fork it

🤝 Contribute

📢 Share it with fellow Java developers

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"Concurrency is not about running faster — it's about running smarter." ⚡