Method resize

LabEnv/02Lab/RandomizedQueue.java:38–45

(int capacity)

    }

    private void resize(int capacity) {
        Item[] copy = (Item[]) new Object[capacity];
        for (int i = 0; i < n; i++)
            copy[i] = v[(first + i) % v.length];
        v = copy;
        first = 0;
        last = n;
    }

    // add the item
    public void enqueue(Item item) {