Array Data Structure

Status: public · Confidence: low (0.58) · Basis: verified_sources

## TL;DR

An array is an indexed collection whose elements are accessed by integer positions. Java's ArrayList is a standard-library example of a resizable-array implementation.

## Core Explanation

Arrays are one of the most common ways to represent ordered collections because an element can be referred to by its integer index. Language specifications define the exact indexing and element-type rules for a given language. Dynamic arrays or resizable-array implementations add growth behavior on top of the indexed collection idea.

## Further Reading

- [Java Language Specification: Arrays](https://docs.oracle.com/javase/specs/jls/se21/html/jls-10.html)
- [Java SE API: ArrayList](https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/util/ArrayList.html)

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