Does the capacity of ArrayList decrease when we remove elements?

Question

ArrayList have a default capacity of 10 objects. As the size exceeds 10 objects, an ArrayList will internally increase its capacity. Does the capacity decrease when we remove the object from ArrayList.

If the ArrayList capacity doesn't decrease, could this lead to performance issues?

Answer 1

It doesn't decrease this automatically. From the doc.

    public void trimToSize()  

Trims the capacity of this ArrayList instance to be the list's current size. An application can use this operation to minimize the storage of an ArrayList instance.