如何跟踪执行while循环的迭代？

Question

lets say i have a do while loop

int index = 20;
do {
    index --;

//stuff

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

I want to be able to keep track of what iteration this do while loop is on so I can print it in console with something like this

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

how would I be able to do this?

Answer 1

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

Answer 2

You can use AtomicInteger class.

In your case:

    final AtomicInteger index = new AtomicInteger(20);

    do {
        index.getAndDecrement();

        //stuff

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

With the above example, you can retrieve the current iteration by printing index or index.get() .

Hope that helps.