Interview question: what does this print?

Sample.java

class Scratch {
    private static boolean done;
    private static int count;

    public static void main(String[] args) throws InterruptedException {
        done = false;
        new Thread(() -> {
            System.out.println("Running");
            count = 0;

            while (!done) {
                count++;
            }
            System.out.println("count = " + count);
        }).run();

        Thread.sleep(2000);
        done = true;
        System.out.println("Done!");
    }
}

Followup: how long does it take to execute?