runMainLotsOfTimes.java

  public static void main(String... args) {

        int count = 0;
        for (int i =0; i <1000; i++) {
            long startTime = System.nanoTime();

            for (int j = 0; j < 1000; j ++) {
                count += j;
            }

            long endtime = System.nanoTime();
            System.out.printf("%d\n", endtime - startTime);
        }

        System.out.println(count);
    }