Java Language Specification, Version Java SE 21 Edition

10.1. Array Types

The number of brackets in an array type or an array initializer corresponds to the length of the array

The type of a multi-dimensional array is written as T[] T[] T[]

Elements of arrays are untyped

The length of an array is part of its type

ArrayLists are arrays

Array rank and array length are the same thing

The rank of an array is not part of its type