import java.util.ArrayList;

public class OwnQueue {
    ArrayList<Object> list;

    public OwnQueue() {
        list = new ArrayList<Object>();
    }

    public boolean add(Object o) {
        return list.add(o);
    }

    public Object remove() {
        if (list.get(0) != null) {
            Object temp = list.get(0);
            list.remove(list.get(0));
            return temp;
        } else {
            System.out.println("Queue is empty");
            return null;
        }
    }

    public static void main(String[] args) {
        OwnQueue que = new OwnQueue();
        que.add("one");
        que.add("two");
        que.remove();
        System.out.println(que);
    }
}