List interface

 In Java, the List interface is an ordered collection that allows us to store and access elements sequentially. It extends the Collection interface.

Classes that Implement List:

• ArrayList

• LinkedList

• Vector

• Stack

How to use List?

In Java, we must import java.util.List package in order to use List.

List<String> list1 = new ArrayList<>();

Methods of List:

• add() - adds an element to a list

• addAll() - adds all elements of one list to another

• get() - helps to randomly access elements from lists

• iterator() - returns iterator object that can be used to sequentially access elements of lists

• set() - changes elements of lists

• remove() - removes an element from the list

• removeAll() - removes all the elements from the list

• clear() - removes all the elements from the list (more efficient than removeAll())

• size() - returns the length of lists

• toArray() - converts a list into an array

• contains() - returns true if a list contains specified element.