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Multithreading in Java 

Multithreading in Java  Java resembles a distinct path of execution within a program that can operate separately from the main program. It enables several things to occur simultaneously within a program. For instance, a program might use one thread for a time-consuming job and another for user interface updates. This could enhance the program’s responsiveness and performance. Thus, Thread can be described as a lightweight process that performs some activities. To learn more about Multithreading in Java, check out the Java course for beginners.

What is a Single thread?

In Java, a program with just one path of execution is referred to as a single thread. This indicates that the computer program can only handle one task at once. The program begins running at the beginning of its code and executes each line of code in sequence until it reaches the end. Once the program has finished executing, it terminates.

A single-threaded program may become unresponsive if any long-running tasks are present since the program won’t be able to react to user input or carry out other operations until the long-running task is finished.

Multithreading in Java : What is it?

The ability to construct and manage numerous threads within a single program is known as multithreading in Java. Multiple threads can be created by a program, and each one can run its own set of instructions alongside other threads. Through the use of multithreading, a program can carry out multiple activities at once, enhancing both its usability and performance.

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There are two methods to use multithreading:

  1. By Implementing Runnable Interface
  2. By Extending the Thread class

By Extending the Thread class 

In this method, the run() method is overridden in a new class that extends the Thread class to specify the code that will execute in the new thread. The run() method will then start running in a separate thread when we create an instance of this class and use the start() method.

Multithreading in Java 

By implementing Runnable Interface

The run() function is overridden in this method to specify the code that will execute in the new thread, and a new class that implements the Runnable interface is created. Then we build a class instance and supply it as a parameter to a fresh Thread object. The run() method is then started in a separate thread by calling the start() method on the Thread object.

Why We Need Multithreading in Java

Modern programming languages like Java have a strong feature called multithreading that enables a program to carry out numerous tasks at once. We’ll go over the numerous justifications for why multithreading in Java is necessary in this blog.

1.To enhance program effectiveness

The performance of a program is improved by employing multithreading in Java, which is one of the main benefits. A program can utilize contemporary CPUs, which frequently have several cores, by running numerous processes simultaneously. This enables the program to carry out more tasks concurrently, greatly enhancing program performance.

2.To enhance user experience

A program’s user interface can be improved by multithreading. For instance, you could wish to maintain the user interface responsive in a graphical user interface (GUI) program while doing a time-consuming activity in the background. The user interface will stay responsive and offer a better user experience if the lengthy task is done in a different thread.

3.To handle I/O operations

When dealing with input/output (I/O) operations, such as reading from or writing to a file, network connectivity, or database access, multithreading is extremely helpful. These processes are frequently delayed, halt the program’s execution, and render it unresponsive. The program can carry on with other activities while waiting for I/O operations to complete by conducting them in a different thread.

Multithreading in Java 

4.To take advantage of multiple CPUs

Programs that need to carry out computationally heavy tasks can benefit greatly from multithreading. Multithreading can be quite advantageous for a program that handles image processing, video encoding, or data analysis, for instance. The program can utilize many CPUs and complete the tasks more quickly by spreading the workload among several threads.

5.It enhances scalability

A program’s scalability can be increased via multithreading. A program can scale up to meet demand by adding more threads as the workload grows to manage the increased work. This can be especially helpful for server programs that must manage a high volume of client requests.


In conclusion, Java’s multithreading capability is a potent tool that lets a program handle numerous tasks concurrently, better user experience, handle I/O operations, utilize multiple CPUs, and enhance scalability. You can develop applications that are more effective, responsive, and scalable by integrating multithreading into your programs. You can check out some of the best online Java courses to learn more about Multithreading.

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