In this java tutorial we will see about the iterator interface and its functionality. We will create an example for the Iterator

• Java Iterator is an interface in the collection framework
• It traverses through all the elements of the collection.
• It works like enumeration.
• It has methods hasNext() and next().
• List, Set interface has iterator() methods .

Example of Java Iterator

import java.util.*;

public class iterator1 {
	public static void main(String[] args) {
		List list = new ArrayList();
		int ar[] = { 11, 22, 33, 44, 55 };
		for (int i = 0; i < ar.length; i++) {
			list.add(ar[i]);
		}
		Iterator i = list.iterator();
		while (i.hasNext()) {
			System.out.print(i.next() + "\t");
		}
	}
}

Output

11 22 33 44 55

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