Java Arrays

External

• https://docs.oracle.com/javase/specs/jls/se8/html/jls-10.html
• https://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

Internal

• Java
• Java Language | Array Types

Overview

Array instances are objects. They are dynamically created, they can be assigned to a variable of type Object and all methods of class Object may be invoked on an array.

An array instance contains a number of variables, called array components that have no names, and can be referenced instead by array access expressions that use non-negative integer indices. The number of components is fixed, once the array instance is created, the number of components cannot change.

The components can have primitive types and reference types. Multidimensional arrays are a special case where all the components have the same array type, which is one of the reference types.

If the number of components of an array is zero, the array is said to be empty. If the array has n components, then it is said that the array has the length n. In this case, its components are referenced with zero-based indices from 0 to n-1.

array element

Array Types

An array type is a case of a reference type.

Multidimensional Arrays

A multidimensional array is an array of multidimensional arrays.