Asynchronous method implementation in threads in java

Category : Java | Sub Category : Java Threads | By Prasad Bonam Last updated: 2023-07-09 09:45:24 Viewed : 342

Asynchronous method implementation in threads :

In Java, you can implement asynchronous behavior using threads. Her is an example of how to create and run asynchronous methods using threads:

javaCopy code
public class AsyncMethodExample {

    public static void main(String[] args) {
        // Create a new thread and start it
        Thread thread = new Thread(() -> {
            // Perform time-consuming operation asynchronously
            // Simulating a delay of 3 seconds
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("Asynchronous operation completed");
        });
        thread.start();

        // Continue executing other tasks in the main thread
        System.out.println("Continuing execution in the main thread");
    }
}

In this example, a new thread is created using the Thread class constructor, which takes a Runnable lambda expression. Inside the lambda, you can define the time-consuming operation that needs to be executed asynchronously.

The Thread.sleep() method is used to simulate a time-consuming operation. It pauses the thread for a specified duration, in this case, 3 seconds. You can replace this with your own time-consuming task, such as a database query, network request, or any other operation that may take a significant amount of time.

After starting the thread using the start() method, it runs concurrently with the main thread. The main thread continues executing other tasks while the asynchronous operation runs in the background.

When you run this code, you will see that "Continuing execution in the main thread" is printed immediately, while "Asynchronous operation completed" is printed after the 3-second delay.

Note that managing threads directly can be complex, and Java provides higher-level concurrency utilities like ExecutorService, CompletableFuture, and ForkJoinPool that offer more control and convenience for asynchronous programming.