That depends whether you can insert elements to any cell you see fit just like a regular array. What you are describing is Vector.
javajavajava - can you please post the complete instructions?
It certainly isn't since a Vector doesn't increase its size by one when it grows, unless you've manually set the capacityIncrement to 1.
protected int capacityIncrement
The amount by which the capacity of the vector is automatically incremented when its size becomes greater than its capacity. If the capacity increment is less than or equal to zero, the capacity of the vector is doubled each time it needs to grow.