Collections

Collections:

Type	Description	Example
Array	Is a collection class that has a set number of elements that can go into the list.	private int[] numbers; - sets an Array of ints numbers = new int[100]; -initiallizes the Array with 100 elements numbers[10] = 8; -Sets index 10 as the number 8 .
ArrayList	Is a collection class that does not have a set limit of how many items can go into the list.	import java.util.ArrayList; -imports the ArrayList class import java.util.Iterator; -imports the iterator that is used in while loops for the class. private ArrayList <Account> account; -sets up an ArrayList account = new ArrayList <Account>(); - initializes it
LinkedList	A collection class where the items in the list are linked with pointers that points to the next or previous item in the list.	private LinkedList llist; - declares llist is a LinkedList Object llist = new LinkedList; - initializes the list.