Java ArrayDeque Class: iterator() Method

public Iterator<E> iterator()

Returns an iterator over the elements in this deque.

The elements will be ordered from first (head) to last (tail).

Package: java.util

Java Platform: Java SE 8

Syntax:

iterator()

Return Value:

an iterator over the elements in this deque

Return Value Type:Iterator<E - the type of elements held in this collection>

Pictorial Presentation

Example: Java ArrayDeque Class: iterator() Method

import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Iterator;

public class Main {
   public static void main(String[] args) {

    // Create an empty array deque with an initial capacity
      Deque<Integer> deque = new ArrayDeque<Integer>(8);

      // Use add() method to add elements in the deque
      deque.add(10);
      deque.add(20);
      deque.add(30);
      deque.add(25);
      
      // Print all the elements of the original deque.
      System.out.println("Original elements of the deque: ");
      for (Integer n : deque) {
         System.out.println(n);
      }
     
      // iterator() is used to print all the elements
      System.out.println("Print all the  elements using iterator:");
      for(Iterator itr = deque.iterator();itr.hasNext();) {
         System.out.println(itr.next());
      }
   }
}
 

Output:

Original elements of the deque: 
10
20
30
25
Print all the  elements using iterator:
10
20
30
25

Java Code Editor:

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