Java Thread: Why isInterrupted returns false for following code

Question

Here is Java code for thread

public class WakeThread extends Thread{

    public void run() {
        boolean running = true;
        while(running) {
            try {
                System.out.println("Going to sleep now");
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                System.out.println("***Thread is interrupted****");
                running = false;
            }
            System.out.println("isInterrupted? : "+ isInterrupted());
        }
    }
    public static void main(String[] args) throws InterruptedException {
        WakeThread t = new WakeThread();
        t.start();
        Thread.sleep(2000);
        t.interrupt();
    }
}

Here is the output of the code

Going to sleep now
isInterrupted? : false
Going to sleep now
***Thread is interrupted****
isInterrupted? : false //I was expecting this to be true

I am unable to understand above behaviour, once the thread is interrupted I was expecting a true result for isInterrupted but it still return false. Could someone please explain what that is happening?

Solution After reading the comments, I am now able to understand the behaviour. Solution as per comments and link is as follow

catch (InterruptedException e) {
    Thread.currentThread().interrupt(); //this is the solution
    System.out.println("***Thread is interrupted****");
    running = false;
}