What are the differences between Java Collection Iterators and Streams?

What are the differences between Java Collection Iterators and Streams?

Java Collection Iterators are used to traverse collections like lists and sets, while Streams provide a functional approach to processing sequences of elements.

Can you give me an example of using an Iterator?

Sure! Here's a simple example:

List<String> list = Arrays.asList("A", "B", "C");
Iterator<String> iterator = list.iterator();
while (iterator.hasNext()) {
    System.out.println(iterator.next());
}

How about an example using Streams?

Absolutely! Here's how you can use Streams:

List<String> list = Arrays.asList("A", "B", "C");
list.stream().forEach(System.out::println);

Which one is more efficient?

It depends on the use case. Iterators are generally more efficient for simple traversals, while Streams can optimize complex operations with parallel processing.