What are Java Collection Iterators?

Can you explain what Java Collection Iterators are?

Sure! Java Collection Iterators are objects that allow you to traverse through a collection, like lists or sets, without exposing the underlying structure.

How do I use an Iterator in Java?

To use an Iterator, you first obtain it from a collection using the iterator() method, then you can use hasNext() and next() methods to iterate through the elements.

What is the difference between an Iterator and a ListIterator?

An Iterator can only traverse the collection in one direction (forward), while a ListIterator can traverse in both directions and also allows you to modify the list.

Can you give me an example of using an Iterator?

Certainly! Here's a simple example:

List<String> list = new ArrayList<>();
list.add("A");
list.add("B");
Iterator<String> iterator = list.iterator();
while (iterator.hasNext()) {
    System.out.println(iterator.next());
}