Deque (Java)

Test.java

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

public class Test{
    public static void main(String[] args){
        Deque<Integer> deque = new ArrayDeque<Integer>();
        /* Adds element normally to the end of the list */
        deque.add(1);
        deque.add(2);
        deque.add(3);
        /* Adds element to the head of the list */
        deque.addFirst(4);
        deque.addFirst(5);
        for(Integer item : deque){
            System.out.print(item + " ");
        }
        System.out.println();
        /* Removes and returns the head of the list */
        System.out.println(deque.pollFirst());
        /* Removes and returns the tail of the list */
        System.out.println(deque.pollLast());
        /* Returns the head of the list */
        System.out.println(deque.getFirst());
        /* Returns the tail of the list */
        System.out.println(deque.getLast());
        for(Integer item : deque){
            System.out.print(item + " ");
        }
        System.out.println();
    }
}