Application.java

public class Application
{
    public static void main(String[] args)
    {
        System.out.println("main thread is started");
        ThreadA threadA = new ThreadA();
        threadA.start();

        ThreadB threadB = new ThreadB(threadA);
        threadB.start();

        System.out.println("main thread completed");
    }
}


class ThreadA extends Thread
{
    public void run()
    {
        System.out.println("ThreadA is running");
        try {
            System.out.println("ThreadA is sleeping for 15 seconds ");
            Thread.sleep(15000);
            System.out.println("ThreadA is waked up ");
        } catch (InterruptedException e) {
            System.out.println("Sleep of ThreadA get interrupted ");
        }
        System.out.println("ThreadA completed");
    }
}


class ThreadB extends Thread
{
    private ThreadA threadA;

    ThreadB(ThreadA threadA)
    {
        this.threadA = threadA;
    }

    public void run()
    {
        System.out.println("ThreadB is running");
        try {
            System.out.println("ThreadB is sleeping for 5 seconds");
            Thread.sleep(5000);
            System.out.println("ThreadB wakes up from sleep and interrupts ThreadA ");
            threadA.interrupt();
        } catch (InterruptedException e) {
            System.out.println("Sleep of ThreadB get interrupted");
        }
        System.out.println("ThreadB completed");
    }
}