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Modify a list while iterating

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by Mark W. Kaelin

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The Dec. 2, Java TechMail discusses the capabilities of the ListIterator class. Have you used the ListIterator class to modify a list during iteration? Tell us about your experience.

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by tconnor

The example of setting all elements of a list to integer zero, as written, sets all elements to refer to the one Integer object "zero", and thus the list elements are not independent.

To set the list to truly independent integers, initially zero-ed, do this:

ListIterator listItr = list.listIterator();
while(listItr.hasNext()) {
Object obj = listItr.next();
listItr.set(new Integer(0));
}

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