Welcome to the Source-Code section of the Java Multithreading repository.

This directory contains all Java source code examples used throughout this repository. The programs are carefully organized in a logical learning sequence, beginning with the fundamentals of multithreading and gradually progressing toward advanced concurrency concepts.

Each program is written with the following objectives:

• Beginner-friendly learning
• Hands-on coding practice
• Concept-by-concept understanding
• Technical interview preparation
• Academic reference
• Professional GitHub documentation

Every source code example includes detailed comments, meaningful variable names, clean coding practices, expected outputs, explanations, key points, and interview questions to provide a complete learning experience.

Source-Code
│
├── README.md
│
├── 01-Introduction-to-Multithreading-in-Java
│
├── 02-Single-Threaded-and-Multithreaded-Programs
│   ├── 01-Single-Threaded-Program-in-Java.java
│   └── 02-Multithreaded-Program-in-Java.java
│
├── 03-Thread-Class-in-Java
│   ├── 03-Creating-a-Thread-Using-Thread-Class.java
│   ├── 04-Printing-Numbers-Using-a-Thread.java
│   ├── 05-Main-Thread-and-Child-Thread.java
│   ├── 06-Getting-Thread-Name.java
│   ├── 07-Setting-Thread-Name.java
│   ├── 08-Getting-Thread-Priority.java
│   ├── 09-Setting-Thread-Priority.java
│   ├── 10-Checking-Thread-Status-Using-isAlive.java
│   ├── 11-Thread-Sleep-Method.java
│   ├── 12-Thread-Join-Method.java
│   ├── 13-Current-Thread-Method.java
│   ├── 14-Thread-Constructors.java
│   ├── 15-Thread-Constructor-With-Thread-Name.java
│   └── 16-Thread-Constructor-With-Runnable.java
│
├── 04-Runnable-Interface-in-Java
│   ├── 17-Creating-a-Thread-Using-Runnable-Interface.java
│   ├── 18-Printing-Numbers-Using-Runnable-Interface.java
│   ├── 19-Multiple-Threads-Using-Runnable-Interface.java
│   ├── 20-Same-Runnable-Shared-by-Multiple-Threads.java
│   └── 21-Anonymous-Runnable-Implementation.java
│
├── 05-Thread-Life-Cycle-in-Java
│   ├── 22-Thread-Life-Cycle-Overview.java
│   └── 23-Thread-State-Using-getState.java
│
├── 06-Thread-Methods-in-Java
│   ├── 24-Thread-Yield-Method.java
│   └── 25-Thread-Interrupt-Method.java
│
├── 07-Daemon-Threads-in-Java
│   ├── 26-Daemon-Thread.java
│   └── 27-User-Thread-vs-Daemon-Thread.java
│
├── 08-Synchronization-in-Java
│   ├── 28-Introduction-to-Synchronization.java
│   ├── 29-Synchronized-Method.java
│   ├── 30-Synchronized-Block.java
│   ├── 31-Static-Synchronization.java
│   ├── 32-Deadlock-Demonstration.java
│   └── 36-Thread-Safe-Counter.java
│
├── 09-Inter-Thread-Communication-in-Java
│   ├── 33-Wait-and-Notify-Method.java
│   ├── 34-NotifyAll-Method.java
│   └── 35-Producer-Consumer-Problem.java
│
├── 10-Java-Concurrency-Utilities
│   ├── 37-Thread-Pool-Introduction.java
│   ├── 38-ReentrantLock-Example.java
│   └── 39-Callable-and-Future.java
│
└── 11-Revision
    └── 40-Java-Multithreading-Revision-Cheat-Sheet.java

The repository follows a progressive learning path.

Topics Covered

• Introduction to Multithreading
• What is a Thread?
• Process vs Thread
• Multitasking
• Advantages of Multithreading
• Applications of Multithreading
• User Threads
• Daemon Threads

Before running the programs, ensure the following software is installed:

• Java Development Kit (JDK 8 or above)
• Visual Studio Code, Eclipse, IntelliJ IDEA, or NetBeans
• Command Prompt, Terminal, or PowerShell
• Git (Optional)

javac FileName.java

Example

javac ThreadPoolIntroduction.java

java ClassName

Example

java ThreadPoolIntroduction

To build a strong understanding of Java Multithreading, study the topics in the following sequence:

1. Introduction to Multithreading
2. Single Threaded Program
3. Multithreaded Program
4. Thread Class
5. Runnable Interface
6. Thread Life Cycle
7. Thread Methods
8. Daemon Threads
9. Synchronization
10. Deadlock
11. Inter-Thread Communication
12. Java Concurrency Utilities
13. Revision Cheat Sheet

Following this sequence ensures that every new concept builds naturally on the previous one.

While learning this repository:

• Practice every program independently.
• Read the comments before executing the program.
• Modify the examples to strengthen your understanding.
• Observe thread execution carefully.
• Practice writing programs without referring to the solutions.
• Understand synchronization before moving to advanced concurrency utilities.
• Revise the interview questions provided with each program.

After completing this repository, you will understand:

• Java Multithreading Fundamentals
• Thread Creation Techniques
• Thread Life Cycle
• Thread Methods
• Daemon Threads
• Synchronization
• Deadlocks
• Inter-Thread Communication
• Thread-Safe Programming
• ExecutorService
• Thread Pools
• ReentrantLock
• Callable
• Future
• Java Concurrency Best Practices

Contributions are always welcome.

If you would like to improve the source code, documentation, or learning materials, feel free to fork the repository, make your changes, and submit a pull request.

Constructive suggestions and improvements are greatly appreciated.

If this repository helps you in your learning journey, interview preparation, or future reference, please consider giving it a Star ⭐.

Your support is greatly appreciated and motivates me to continue creating high-quality educational repositories.

This project is licensed under the MIT License.

Please refer to the LICENSE file for more information.