Example of Multithreading in Java

foExample of Multithreading in Java

Problem Statement

Write Java code to print multiples of 2,3,4 simultaneously.

Solution

In order to print multiples of 2, 3, and 4 simultaneously using threads in Java, you can create three separate threads, each responsible for printing multiples of one of these numbers. The following Java program demonstrates this.

class MultiplesPrinter extends Thread {
    private int multiple;

    public MultiplesPrinter(int multiple) {
        this.multiple = multiple;
    }

    @Override
    public void run() {
        for (int i = 1; i <= 10; i++) {
            System.out.println("Multiple of " + multiple + ": " + (i * multiple));
            try {
                Thread.sleep(200); // Sleep for 200 milliseconds
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

public class MultiplesPrintingApp {
    public static void main(String[] args) {
        // Create three threads to print multiples of 2, 3, and 4
        MultiplesPrinter thread2 = new MultiplesPrinter(2);
        MultiplesPrinter thread3 = new MultiplesPrinter(3);
        MultiplesPrinter thread4 = new MultiplesPrinter(4);

        // Start all three threads
        thread2.start();
        thread3.start();
        thread4.start();
    }
}

In this program:

We create a MultiplesPrinter class that extends the Thread class. This class takes an integer parameter in its constructor, which represents the multiple to be printed (2, 3, or 4).
Inside the run method of MultiplesPrinter, we use a loop to print the multiples of the given number from 1 to 10. We also introduce a 200-millisecond delay between each print using Thread.sleep().
In the main method, we create three instances of MultiplesPrinter for multiples 2, 3, and 4.
We start all three threads using the start() method.

As a result, all three threads will run concurrently and print the multiples of 2, 3, and 4 simultaneously, creating an interleaved output.

Problem Statement

Solution

Further Reading