> For the complete documentation index, see [llms.txt](https://hanfak.gitbook.io/workspace/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hanfak.gitbook.io/workspace/languages/java/beginner/data-structures/arrays.md). # Arrays * static array * does not change size of array * has fixed memory, all in adjacent location to first element * terminology * array: An orderd list of elements * element: A member of an array * index: The position of the element in the array. * Starts counting at 0, so the first element is at index 0 * size: how many elements can fit in the array * setting with size * setting with data * declaring a variable of array * Add data * remove data * read data * one element * reading all elements * reading elements depending on their index * ArrayIndexOutOfBoundsException * multi dimensional arrays * read from multidimenisonal arrays * adding data to mulitdimensional arrays * Copying arrays * searching * finding * slicing/sublist * comparing arrays * sorting arrays * Issues at runtime * use arraylist * Increasing size of arrays ## Array VS Linked list * When to use Linked List over Arrays * Need constant-time insertions/deletions from the list * Dont konw size of List * Insert items in the middle of the lis * When to use arrays of linked list * you need indexed/random access to elements * Size already fixed at initiliaztion * Use less memory * ArrayList handle dynamic sizing of array ## Links * * * * * * * * *