How Can I Improve on the ArrayList’s Capacity Management?

One idea is to make your collection shrink when it's not being fully utilized. For example, if it gets down to 25% capacity, you could halve the size. This helps save memory, but it's not the quickest solution. Make sure you clarify your requirements, as there might be specific tasks your ADT needs to excel in beyond just being a 'better ArrayList.'

It's really hard to say what 'better than ArrayList' means without more context. Are you concerned about the time it takes to double the size, the amount of memory it uses when it resizes, or the frequency of resizing? When you know exactly what problem you're addressing, it'll help you figure out the right approach!

Consider adding a feature on top of your ArrayList that lets you efficiently check for membership! Whether this makes it 'better' truly depends on what better means in your case. Don’t forget to clarify the actual requirements of your assignment, as they might guide your enhancements.

Remember that the ArrayList's add operation is generally fast, running in amortized constant time. If you anticipate adding many elements, calling `ensureCapacity` ahead of time can help reduce reallocations, potentially improving performance while keeping the same complexity. It might not be a drastic overhaul, but it's a useful tip!