What's up with ArrayLists?

ArrayLists are great when we don't know the final size of an arrayArrayLists are variable in sizeArrayLists are lists of arraysArrayLists are sorted arrays

Splendid! ArrayLists kind of like variable-length arrays and great whenever we don't know how large a collection of elements will be in the end.

Whoops! ArrayLists kind of like variable-length arrays and great whenever we don't know how large a collection of elements will be in the end.