If I don't have getList() in Deque, how should I change in get method to return correctly?

import java.util.List; import java.util.ArrayList;

public class Test {

/**
 * @param args
 * @throws Exception 
 */
public static void main(String[] args) throws Exception {
    // TODO Auto-generated method stub
    Deque queue = new Deque();

    int random = (int)(Math.random() * 100);

    queue.addLast(10);
    queue.addLast(20);
    queue.addLast(random);
    queue.addLast(40);
    queue.addLast(50);

    for(int i = 0; i < 2; i++) {

        assertTrue(get(queue, 0) == 10);
        assertTrue(get(queue, 1) == 20);
        assertTrue(get(queue, 2) == random);
        assertTrue(get(queue, 4) == 50);
        assertTrue(get(queue, 3) == 40);

        try {
            System.out.println(get(queue, 5));
            assertTrue(false);
        } catch(Exception e) {
            assertTrue(true);
        }
    }       
}

public static void assertTrue(boolean v) {
    if(!v) {
        Thread.dumpStack();
        System.exit(0);
    }
}


public static int get(Deque queue, int index) throws Exception 
{     
    // 1) Only fill in your code in this method
    // 2) Do not modify anything else
    // 3) Use of 'new' keyword is not allowed
    // 4) Do not use reflection
    // 5) Do not use string concatenation

    return queue.getList().get(index);      
}

}

class Deque { private List items;

public Deque() {
    items = new ArrayList<Integer>();
}

public void addFirst(int item) {
    items.add(0, item);
}

public void addLast(int item) {
    items.add(item);
}

public int removeFirst() {
    if(isEmpty()) throw new RuntimeException();
    return items.remove(0);
}

public int removeLast() {
    if(isEmpty()) throw new RuntimeException();
    return items.remove(items.size() - 1);
}

public boolean isEmpty() {
    return items.size() == 0;
}

public List<Integer> getList()
{
    return items;       
}

}

// End

Thanks ~July