![iterating through an array vs arraylist iterating through an array vs arraylist](https://dz2cdn1.dzone.com/storage/temp/13990724-arraylist-vs-linkedlist-complexity.png)
There is no initial capacity defined for LinkedList, and it is not implementing a RandomAccess interface. LinkedList internally maintains doubly-linked lists which store the memory address of previous and next object, so there will be no kind of structure which will keep memory address of the previous node and next node. ArrayList is not good to use for frequent addition and deletion of elements due to multiple shift operations. Since ArrayList implements a random access interface, it is good to use when its elements are fetched frequently. The formula for new ArrayList’s capacity is New Capacity = Current capacity*1.5+1 ArrayList can be created with the required initial capacity. After reaching its maximum capacity, a new ArrayList is created with increased capacity, and all the records will be copied in the new ArrayList. Now let’s have a brief introduction about “What is ArrayList?” and “What is LinkedList?” ArrayList is a growable array which has an initial capacity of ten.
![iterating through an array vs arraylist iterating through an array vs arraylist](https://cdn.educba.com/academy/wp-content/uploads/2018/08/Java-List-vs-Array-List.jpg)
Both are not synchronised collections which can be synchronised through using Collections.synchronisedList()method.
![iterating through an array vs arraylist iterating through an array vs arraylist](https://miro.medium.com/max/904/1*XSFsLZYm0B8UcjztjEbzzA.png)
Both implements cloneable interface both the elements themselves are not cloned.Both allow inserting null as well as different types of objects.Both implements List interface and they got default behaviour of list interface, i.e., both are ordered collection, and they will maintain insertion order.One of the most famous interview questions for beginners as well as Java developers with two-three years of experience is the difference between ArrayList and LinkedList.īefore getting into differences, let’s understand the similarities between ArrayList and LinkedList so that it will not be challenging to know the differences.