What is the difference between Array, ArrayList and List?

Question

Anonymous User · Answer

First of all, all of them are used when we want to store more than one values but want to create one variable.

Arrays

Disadvantages

Array is a fixed sized data structure. We cannot change the length of an array once it is created.
Array requires continuous memory blocks.

Advantages

Array List

Disadvantages

It’s not type safe.
Performance wise not good because every time we add some value inside it, automatic boxing will performed (value will converted to object) and every time we want to retrieve something from it we have to explicitly perform unboxing(convert object back to value).

Advantages

Dynamic size – With every new addition and removal of item, size of a data structure changes.
Won’t require continuous memory allocation.

List

Advantages

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