What are the key differences between an Array and an ArrayList, and can you provide examples?

Question

Accepted Answer

Arrays are fixed-size, while ArrayLists are dynamic and can grow or shrink in size.

Size: Arrays have a fixed size, e.g., String[] arr = new String[5];
Dynamic Resizing: ArrayLists can change size, e.g., ArrayList list = new ArrayList<>();
Type Safety: Arrays can hold primitives and objects, while ArrayLists can only hold objects, e.g., list.add("Hello");
Performance: Arrays are faster for accessing elements, while ArrayLists have overhead due to dynamic resizing.
Methods: ArrayLists come with built-in methods like add(), remove(), and contains(), e.g., list.remove("Hello");

Accepted Answer

An array is a fixed-length data structure. ArrayList is a variable-length data structure.

Accepted Answer

An array is a fixed-length data structure. ArrayList is a variable-length data structure.

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