What are iterators in Java collections?

What are iterators in Java collections?

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 to loop through a list?

You can use the Iterator interface. First, create an iterator using list.iterator(), then use hasNext() and next() methods to loop.

Can you show me a code example?

Sure! 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());
}

What are the advantages of using iterators?

Iterators provide a uniform way to traverse collections, allow for safe removal of elements during iteration, and can work with different types of collections.