Java tutorial
import java.util.ArrayDeque; import java.util.Deque; public class Main { public static void main(String[] args) { ArrayDeque<Integer> deque = new ArrayDeque<Integer>(8); deque.add(3); deque.add(1); deque.add(25); deque.add(18); System.out.println(deque); // printing the array length of elements added above Integer[] ob = deque.toArray(new Integer[deque.size()]); System.out.println("\n Array Size : " + ob.length); } }