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List in Java is a sub-interface of the collection interface that gives optimal solutions with concepts like positional access, iteration and so on. In this article, I will discuss the major differences between the list interface LinkedList vs ArrayList in Java.
Below are the topics covered in this article:
After arrays, the second most popular data structure is definitely a Linked List. A linked list is a linear data structure which is constituted by a chain of nodes in which each node contains a value and a pointer to the next node in the chain. Also, the last link in a linked list points to null, indicating the end of the chain. An element in a linked list is called a node. The first node in the list is called the head. The last node is called the tail.
Let me give you a simple example of this: Imagine a chain of paperclips that are linked together. You can easily add another paperclip to the top or bottom. It’s also easy to insert one in the middle. All you have to do is to just break the chain at the middle, add a new paperclip, then reconnect the other half. A linked list is similar to this.
ArrayList in Java is the implementation of List Interface where the elements can be dynamically added or removed from the corresponding list. Here, the size of the list is increased dynamically if the elements are added more than the initial or actual size. Though it may be slower than standard arrays, it can be helpful in programs where lots of manipulation in the array is required.
ArrayList is used for these purposes:
These are the notable similarities between LinkedList and ArrayList in Java.
First, let’s take a look at the parameters to compare LinkedList vs ArrayList in Java.
Parameters to compare LinkedList and ArrayList in Java:
The insertion, addition and removal operations of an item are faster in a LinkedList because we don’t need to resize as we do in ArrayList.
ArrayList is based on the concept of a dynamically resizable array, while LinkedList is based on doubly linked list implementation
A LinkedList class can be used as a list and a queue because it implements List and Deque interfaces whereas ArrayList can only implement Lists.
A LinkedList consumes more memory than an ArrayList because every node in a LinkedListstores two references, whereas ArrayList holds only data and its index
Insertion, addition, and removal operations are quite faster
Comparatively the operations are slow here
Follows Doubly linked list implementation
Follows the concept of dynamically resizable array
A LinkedList class can be a list and a queue because it implements List and Deque interfaces
An ArrayList class can be a list because it implements only Lists
Memory consumption in LinkedList is high
Less compared to LinkedList
That’s all folks! This brings us to the end of this article on the LinkedList vs ArrayList in Java. I hope you guys are clear with what is taught in this article.
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