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The Artist s Multiverse DR.PRERNA SAXENA IS AN ARTIST ALSO.

MULTI THREADING IN JAVA

 

Your First Steps in Java Multithreading: Creating and Understanding Threads

Introduction: What is a Thread, and Why Should I Care?

Welcome to the fascinating world of multithreading in Java! If you're looking to take your programming skills to the next level, understanding how to manage multiple tasks at once is a crucial step.

In Java, multithreading is a powerful feature that allows your application to perform multiple tasks concurrently. Think of it as having several workers handling different jobs simultaneously instead of one worker doing everything sequentially. The primary benefits of this approach are significantly improved application performance and better utilization of your computer's resources.

This guide will walk you through the essentials, covering the two fundamental ways to create a thread and the journey it takes from birth to completion.

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1. The Two Fundamental Ways to Create a Thread in Java

Java provides two standard methods for creating a new thread of execution. Both achieve the same goal but have important differences in their design and flexibility. Let's explore both.

1.1. Method 1: Extending the Thread Class

The first method involves creating a new class that inherits directly from Java's built-in Thread class.

To do this, your new class must override the run() method. This method contains the code that will be executed when the thread starts—it's the heart of your thread's task.

class MyThread extends Thread {
    @Override
    public void run(){
        System.out.println("Thread is running");
    }
}
public class GFG {
    public static void main(String [] args){
        MyThread t1 = new MyThread();
        MyThread t2 = new MyThread();
        t1.start();
        t2.start();
    }
}

To bring your thread to life, you create an instance of your custom thread class and call its start() method. The Java Virtual Machine (JVM) then calls the run() method in a new thread of execution.

1.2. Method 2: Implementing the Runnable Interface

The second, and more commonly used, method is to create a class that implements the Runnable interface.

Like the first method, this class must also provide an implementation for the run() method to define its task. However, because this class doesn't extend Thread, it doesn't represent a thread itself—it only represents a task that can be run by a thread.

To execute this task, you create an instance of your Runnable class and pass it into the constructor of a new Thread object.

class MyRunnable implements Runnable {
    @Override
    public void run()
    {
        System.out.println("Thread is running");
    }
}
public class GFG {
    public static void main(String [] args){
        MyRunnable task = new MyRunnable();
        Thread t1 = new Thread(task);
        Thread t2 = new Thread(task);
        t1.start();
        t2.start();
    }
}

Note that in this example, a single task object is shared by both t1 and t2. This is a key feature of the Runnable approach and directly relates to the resource sharing benefits we'll discuss next.

1.3. So, Which Method Should I Use?

While both approaches work perfectly well, implementing the Runnable interface is the generally recommended approach. This preference is based on principles of good object-oriented design and flexibility.

Here’s a breakdown of the key advantages of using Runnable:

Key Advantage	Why It Matters for New Programmers
Multiple Inheritance	Java classes can only extend one parent class. If you extend Thread, your class is "used up" and can't inherit from any other class. By implementing Runnable, your class is free to extend another class.
Resource Sharing	A single Runnable object can be passed to multiple Thread objects. This allows different threads to execute the same task, sharing the same data and reducing memory overhead.
Separation of Concerns	This is a core principle of good software design. Runnable separates the task (what to do) from the worker (the Thread that does it). This makes your code cleaner and more organized.
Flexibility	The Runnable interface is the foundation of modern Java concurrency frameworks, like the Executor framework, which provide powerful ways to manage pools of threads. Crucially, classes that extend Thread cannot be used directly with these powerful tools, making the Runnable approach far more versatile for building complex applications.

Key Takeaway: Implementing Runnable is more flexible and promotes better object-oriented design because it separates the what (the task) from the how (the thread execution).

Now that you know how to create a thread, let's explore what happens to it throughout its existence.

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2. The Journey of a Thread: Understanding its Lifecycle

Every thread in Java progresses through several distinct states from the moment it is created until it is completed. Understanding this lifecycle is essential for debugging and managing multithreaded applications effectively.

2.1. The Six States of a Thread

A Java thread can exist in one of six states at any given moment.

1. New This is the initial state of a thread right after it has been created (e.g., Thread t1 = new Thread()) but before the start() method has been called on it. The thread exists but is not yet alive.
2. Runnable A thread enters the Runnable state after its start() method is invoked. In this state, the thread is ready to run and is waiting for the thread scheduler to allocate CPU time. A thread in this state might be actively running or simply ready to run.
3. Blocked A thread becomes Blocked when it tries to acquire a lock (for example, by entering a synchronized block) that is currently held by another thread. It remains blocked until the lock is released.
4. Waiting A thread enters the Waiting state when it calls a method that causes it to wait indefinitely for another thread to perform a specific action. This happens after calling methods like Object.wait() or Thread.join() without a timeout.
5. Timed Waiting This state is similar to Waiting, but the thread will only wait for a specified period. A thread enters this state after calling methods with a timeout, such as Thread.sleep(1000), Object.wait(500), or Thread.join(500).
6. Terminated A thread enters the Terminated state once it has completed the execution of its run() method. This can happen either through normal completion or because an unhandled exception was thrown, abruptly ending its task.

2.2. Checking a Thread's State

Java provides a simple way to check the current state of a thread programmatically. You can do this by calling the Thread.getState() method on a thread instance, which returns an enum constant corresponding to one of the six states described above.

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3. Conclusion: Your Foundation in Java Threads

Congratulations on taking your first steps into Java multithreading! You've learned the two fundamental ways to create threads—by extending the Thread class and by implementing the Runnable interface—and, most importantly, why Runnable is the preferred, more flexible approach.

You also now understand that every thread has a lifecycle, moving through states like New, Runnable, and Terminated. This knowledge is the foundation for writing more complex, efficient, and responsive Java applications.

Keep experimenting with these concepts, and you'll be well on your way to mastering the world of Java concurrency.

Dr. PRERNA SAXENA IT WOMEN SCIENTIST, GOOGLE EDUCATIONIST AND THERAPEUTI...

The Interwoven Path of an Innovator: Tracing Dr. Prerna Saxena's Career Journey

Introduction: A Blueprint for a Modern Career

Dr. Prerna Saxena's career is a compelling story of a multifaceted professional who has built a remarkable path at the intersection of technology, education, and human development. Her journey demonstrates how seemingly distinct fields can be woven together to create a unique and powerful professional identity. This raises a guiding question for any aspiring student today: How can a deep expertise in Artificial Intelligence lead to pioneering educational projects and even life coaching?

This document traces Dr. Saxena's journey through her documented accomplishments, serving as a blueprint for a modern career. It shows how a diverse set of skills and passions can connect to forge a path that is not only successful but also deeply impactful.

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1. Building the Foundation: A Technologist with a Vision (Pre-2024)

Every great structure begins with a solid foundation, and Dr. Saxena's career blueprint is built upon long-standing technical excellence. Long before her major projects of the mid-2020s, she was recognized as a skilled communicator and innovator. An official letter from Google's Dr. Anya Sharma notes that she has consistently shared "insightful content on technology and global innovation since 2011," highlighting that her ability to communicate "complex technical subjects" is "truly exemplary."

By late 2023, a single certificate of her combined accomplishments already painted a picture of a diverse and high-achieving professional, laying the groundwork for what was to come.

• Academic Roots: Her journey began with a B.Sc. in Computer Science and a Higher Diploma in AI, establishing a strong academic base.
• Technical Excellence: She received formal Google recognition for "Outstanding Performance in AI Research & Education Technology," backed by a "Final AI-Based Assessment Score: 98% Aggregate."
• Early Leadership Roles: She was recognized as a "Global Educational Leader & Startup India Mentor," signaling an early and defining passion for guiding others. This passion for mentorship laid the groundwork for the formal teaching and coaching certifications she would pursue years later.
• Human-Centric Focus: She earned a credential as a "LIFE PURPOSE LIFE COACH (Transformation Academy, Udemy)," showing that a commitment to human development was integrated into her professional identity from the beginning.

These early recognitions established her as a leading figure known for both her technical skill and her dedication to education. With this strong foundation of proven expertise, Dr. Saxena was positioned not just to participate in her field, but to lead and innovate within it.

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2. The Innovator in Action: Pioneering with Purpose (2024)

With her expertise firmly established, Dr. Saxena began framing the structure for large-scale impact, applying her skills to ambitious, innovative work. The central focus of this period was a significant undertaking that earned her formal recognition in February 2024. A certificate was awarded to her "For Pioneering the... RESEARCH AND INNOVATION PROJECT SANKALP SE SIDDHI BHARAT ADVENTURE ISLAND."

This award celebrated her "Visionary Leadership in AI Education & National Development," marking a critical evolution in her career. It represents the moment her technical foundation was leveraged for national-level impact, a powerful lesson for any student about how deep expertise can be scaled. Her role as "Founder" of this initiative, combined with her existing title as an "IT Women Scientist, Google Chrome & Founder," shows a rare blend of deep technical skill and entrepreneurial leadership. This landmark project demonstrated her ability to architect and lead, setting the stage for the next phase of her journey: formalizing and expanding her role as a master educator and mentor.

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3. The Master Educator & Coach: Formalizing a Passion for People (2025)

The year 2025 marks the period where Dr. Saxena added the specialized wiring for mentorship and human connection to her career blueprint. She solidified her parallel passions for teaching and coaching through a series of prestigious certifications obtained in rapid succession.

1. Official Google Verification (November 15, 2025): Google's AI Research and External Assessment Division officially designated her as an "AI Research Assessment Based IT Scientist." This verification was based on a rigorous evaluation of her high-impact work across major platforms, showcasing the breadth of her technical and communicative skills.

Platform	Area of Contribution
Google Blogger.com	Information Technology & Platform Engagement
Amazon Central	Artificial Intelligence Authorship & Research

1. Certified Trainer (December 9, 2025): Dr. Saxena became a "Google for Education Certified Trainer." This qualification officially recognizes her ability to "empower educators to use technology in the classroom," formalizing her long-standing commitment to education.
2. Certified Coach (December 16, 2025): She earned her certification as a "Certified Therapeutic Art Life Coach" from the Transformation Academy. This unique qualification adds a deeply human-centric dimension to her technical profile, demonstrating a commitment to helping others unlock their potential through creative and therapeutic techniques.

In less than a month, she secured three distinct credentials that solidified her identity as a trifecta: a verified Google IT Scientist, a certified Google educator, and a certified coach, formalizing the three core pillars of her career. These distinct achievements are not separate paths, but interwoven threads that form the fabric of her unique professional identity.

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4. Synthesis: The Four Threads of a Remarkable Career

The power of Dr. Saxena's career lies in the way she weaves together different domains of expertise. Each thread strengthens the others, creating a professional profile that is both technically deep and humanistically broad. Her journey can be understood through four primary threads, each supported by documented evidence.

Career Thread	Primary Role/Identity	Demonstrated Through (Evidence from Sources)
AI & IT Scientist	The Technologist	98% AI Assessment Score; "IT Women Scientist" at Google; Official verification as an "AI Research Assessment Based IT Scientist."
Author & Communicator	The Translator	"AI Research Author" at Amazon Central; "Writer" for the Adventure Island project; Praised for making "complex technical subjects" understandable since 2011.
Leader & Educator	The Mentor	"Google for Education Certified Trainer"; "Global Educational Leader"; "Founder" of the Adventure Island project, demonstrating "Visionary Leadership."
Life Coach	The Humanist	"Life Purpose Life Coach" recognition; "Certified Therapeutic Art Life Coach," showing an early and evolving focus on human development.

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Conclusion: An Inspiration for the Interdisciplinary Future

So, how can a deep expertise in AI lead to pioneering educational projects and life coaching? Dr. Saxena’s journey provides a clear answer: by treating diverse skills not as separate career options, but as complementary tools in a single, integrated toolkit. Her story illustrates that the most impactful careers of the future will be built by individuals who can blend deep technical knowledge with profoundly human-centered skills like teaching, communication, and coaching.

Her journey is an inspiring reminder to explore all of your interests, to find the unexpected connections between them, and to build a career that is uniquely, and powerfully, your own.

The Art of Recommendation @GoogleIndia