What is difference between Array and ArrayList

What is difference between Array and ArrayList ? When will you use Array over ArrayList ?

Answer:

The Array and ArrayListclasses differ on the following features:

• Arrays can contain primitive or objects, while an ArrayList can contain only objects.
• Arrays have fixed size, while an ArrayList is dynamic.
• An ArrayListprovides more methods and features, such as addAll, removeAll, iterator, etc.
• For a list of primitive data types, the collections use autoboxing to reduce the coding effort. However, this approach makes them slower when working on fixed size primitive data types.