Additional Notes
Why does calling clear() on an ArrayList matter in practice?
Track: Java
Topic: Collections
Focus: List Interface and ArrayList
Java: List Interface and ArrayList
Answer
Clears all elements without changing capacity.
Calling clear() on an ArrayList removes all elements, but the underlying array's capacity remains unchanged. This is efficient if you plan to refill the list, as it avoids reallocating space.
Calling clear() on an ArrayList removes all elements, but the underlying array's capacity remains unchanged. This is efficient if you plan to refill the list, as it avoids reallocating space.
Topics: Collections Java List Interface and ArrayList