public class Queue extends LinkedList {
	public Object pop() {
		if (head == null) {
			return null;
		} else {
			Object temp = head.getElement();
			head = head.getNext();
			return temp;
		}
	}
	
	public void push(Object obj) {
		Node current = head;
		
		Node newNode = new Node(obj, null);
		if (current == null) {
			head = newNode;
		} else {
			while (current.getNext() != null) {
				current = current.getNext();
			}
			current.setNext(newNode);
		}
	}
	
	public boolean isEmpty() {
		return head == null;
	}
}