AP Computer Science A Question of the Day

All of the other answer choices are differences between Arrays and ArrayLists in Java.

Arrays can store both primitives and Objects, while ArrayLists can only store Objects.

Arrays have a fixed size at creation, while ArrayLists can grow as needed.

To find the number of spots in an Array, you append .length to the end of it. To find the number of spots in an ArrayList, you use the size() method.

You have to manually add things to an Array by calling a command similar to my_array[some_number] = some_value. With ArrayLists, you use the add() method.