import java.util.LinkedList;

​

public class LimitedQueue<E> extends LinkedList<E> {

    private int limit;

​

    public LimitedQueue(int limit) {

        this.limit = limit;

    }

​

    @Override

    public boolean add(E o) {

        super.add(o);

        while (size() > limit) { super.remove(); }

        return true;

    }

}