如何使用ListIterator编辑列表内容

Question

I'm using a ListIterator to iterate over a list of some object. The goal is to edit the contents of the list.

Here's an example of what I'm doing:

public class Test {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        ArrayList list = new ArrayList<>(Arrays.asList("One", "Two", "Three","Four","Five"));
        ListIterator<String> listIterator = list.listIterator();
        String current ;
        while (listIterator.hasNext()) {
            doSomething(listIterator); 
            current = listIterator.next();
            //here I Want that current has the same value  as it was Before The doSomething Call
            //or in other Word , i want to save the adress of the last visired object In the List before doSomething Call.
    //As a result i can iterate from this point in the List.
            }

        }

    private static ListIterator<String> doSomething(ListIterator<String> listIterator) {
        System.out.println("Dosomething " + listIterator.next()); //
        System.out.println("Dosomething " + listIterator.next()); //
        System.out.println("Dosomething " + listIterator.next()); //
        System.out.println("Dosomething " + listIterator.next()); //
        return listIterator;
    }
}

Could you please give me some insight?

I'm using ListIterator because I want to go forth and back in the list, and for editing purposes.

Answer 1

ListIterator keeps track of the current index, so you can save it and rewind after you call doSomething :

int pos = listIterator.nextIndex();
doSomething(listIterator);
while (listIterator.nextIndex() > pos) {
    listIterator.previous();
}

This assumes that doSomething only advances the iterator.