Because we can add or remove easily in LinkedList. Because it supports random access.Д«ut LinkedList performs better than ArrayList when we want to perform manipulation. PerformanceДЄn ArrayList performs better than LinkedList when store and access the elements. When we access elements by index value, that element goes for search from head to tail. We can get any element randomly by an index value.Д«ut LinkedList class doesnвЂ™t implement the Random interface, so we canвЂ™t access the element directly. AccessДЄs we know ArrayList class implements a Random interface, so it supports the random access of elements based on the index value. Here each element stores as a node and the node has the address part, that contains the address of the previous and next node. Here each element stores in the unique index value.Д«ut LinkedList uses the doubly linked list structure to store the elements and each element bind with the next and previous element. It is a growable Array and it can increase and decrease itself when we manipulate it. Data structureДЄn ArrayList uses internally a dynamic Array. Because it creates a node when we add an element. Whenever we create an ArrayList it has default size that is 10.Д«ut A LinkedList doesnвЂ™t have default capacity. The default capacity of the ArrayList class is 10. You can see LinkedList class doesnвЂ™t implement RandomAccess interface but implements Deque interface.

The LinkedList class implements the List, CloneableВ and Serializable, DequeВ interface and extends the AbstractList class. The ArrayList class implements the List, Cloneable, RandomAccess,В and Serializable interfaceВ and extends the AbstractListВ class. Implementation of both classes are the first difference between ArrayList and LinkedList in java. There are many similarities in both, but we will discussВ how ArrayList vs LinkedList in deep. In this post, we will see the difference between ArrayList and LinkedList. Both data structures introduced due to the limitation of the array because the Array has a predefined and fixed size. LinkedList has a complexity of O(n) for the get() operation, but O(n) for the remove() operation.In java, ArrayList and LinkedListboth are linear data structures in the Collection framework.ArrayList has a time complexity of O(n) for the two operations add() and remove(), but O(1) for the operation at the end of the list or for the retrieval of an element with the method get().Performance of ArrayList and LinkedList Operation Use ArrayList in Java in these situations when you need unsynchronized access.These two operations are faster in LikedList. Your app has more insert and delete than retrieve.Your application does not need random access, because that operation is to iterate through the entire list in this case.Obviously, LinkedList is not popular like ArrayList, but is still a good choice in some cases : When to use LinkedList and ArrayList in Java ? LinkedList has more memory than ArrayList because in ArrayList each index is linked with the current object, but in the case of LinkedList each node is linked with the element and address of the next and previous node.Removal is like inserting, better in LikedList than in ArrayList.Inserts are easy in LinkedList compared to ArrayList because there is no risk when resizing and adding the item to LinkedList and its complexity is O (1), while ArrayList shifts all items with a complexity of O (n) in the worst case.In the case of LinkedList, it does not have direct access to items, you have to go through the whole list to retrieve an item, its complexity is equal to O (n).

The get (index) method has a complexity of O (1), but the removal is expensive because you have to shift all the elements.

Since the search in ArrayList is based on the index of the element then it is very fast.

All the differences between LinkedList and ArrayList have a source which is the difference between an array and a LinkedList (linked list).

Array vs arraylist vs linkedlist java