如何跟踪执行while循环的迭代？

 jaba  2019-09-18 20:19:14  28   2    java/ loops/ iteration/ do-while

int index = 20;
do {
    index --;

//stuff

} while (index > 0);
index = index + 1;

System.out.println("current iteration number is = " + iterationnumber);

startNumber= 20;
index = startNumber
do{
    ....
    index--;
    itterNum = startNumber-index;
....
}

    final AtomicInteger index = new AtomicInteger(20);

    do {
        index.getAndDecrement();

        //stuff

    } while (index.get() > 0);