What behavior can be expected when calling the next method on an iterator object?

The next() method of an iterator object in Java returns the next element of the collection and advances the internal pointer.

Main points of next() behavior:

• If there is a next element (checked via hasNext()), next() returns this element.
• If there is no next element, calling next() throws a NoSuchElementException.

Example:

Iterator<String> iterator = list.iterator();
while (iterator.hasNext()) {
    String element = iterator.next();
    System.out.println(element);
}

Always call hasNext() before next() to avoid exceptions.