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Note that MutableList is a list because it inherits from the List interface. A mutable list is a list that can be modified by adding or removing elements in the data structure.Īn immutable list is a list that cannot be modified by either adding or removing elements in the data structure.įrom the two terms, we can have two types of lists that include List and MutableList. Use the Constructor of a Data Structure in Kotlinīefore diving into the examples, we must understand two common terms when working with the type List data.Use the mutableListOf() Method in Kotlin.

We add elements using the add() method that the LinkedList class inherits from the Collection interface. How to add elements to LinkedList in Java? LinkedList inherits the same methods as ArrayList, so we use exactly the same methods to manipulate elements. Or using polymorphism. The variable that holds the address of the new object will be of type List. This is possible because LinkedList implements the List interface. LinkedList list = new LinkedList() īetween the  brackets, we specify which type of elements the list will contain. We create a new LinkedList object by instantiating it, just like any other class in Java. Manipulation with ArrayList is slower because it internally uses an array.The ArrayList class implements the List interface only, while LinkedList implements List and Deque interfaces,.