class MyTask implements Runnable {
    public static int teller = 0;
    private final int id;

    public MyTask() {
        teller++;
        id = teller;
    }
    public void run() {
        for (int i = 1; i < 5000; i++)
            if (i % 1000 == 0)
                System.out.printf("Hello for the %d-th time!\nThis is thread number %d\n", i / 1000, id);
    }
}