iterator java8

In Java 8 and later versions, the Iterator interface has been extended with a new forEachRemaining() method that allows you to iterate through the elements of a collection in a more concise way using a lambda expression.

Here is an example of how to use the forEachRemaining() method with an ArrayList:

List<String> list = Arrays.asList("A", "B", "C", "D");

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

This code prints the elements of the list to the console, one element per line.

You can rewrite this code using the forEachRemaining() method as follows:

List<String> list = Arrays.asList("A", "B", "C", "D");

list.iterator().forEachRemaining(element -> System.out.println(element));

In this example, the lambda expression passed to the forEachRemaining() method simply prints the current element to the console. You can use a similar approach to perform other operations on the elements of the collection.

For more information on the forEachRemaining() method and other features of the Iterator interface in Java 8 and later, you can refer to the Java documentation or other online resources.