What is Linked List in Java??
Vijay Kumari
Linked List are linear data structures where the elements are not stored in contiguous locations and every element is a separate object with a data part and address part. The elements are linked using pointers and addresses. Each element is known as a node. Due to the dynamicity and ease of insertions and deletions, they are preferred over the arrays. It also has few disadvantages like the nodes cannot be accessed directly instead we need to start from the head and follow through the link to reach to a node we wish to access. To store the elements in a linked list we use a doubly linked list which provides a linear data structure and also used to inherit an abstract class and implement list and deque interfaces.In Java, LinkedList class implements the list interface. The LinkedList class also consists of various constructors and methods like other java collections.Constructors for Java LinkedList:LinkedList(): Used to create an empty linked list. LinkedList(Collection C): Used to create a ordered list which contains all the elements of a specified collection, as returned by the collection’s iterator.
Java LinkedList is linear Java data structures where all the elements are stored in non-contiguous memory locations. A doubly linked list is used in Java LinkedList.
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In Java, a linked list is a data structure that consists of a sequence of nodes, where each node contains data and a reference to the next node in the list. Unlike arrays, linked lists do not require contiguous memory allocation.
The first node in a linked list is called the head, and the last node is called the tail. Each node contains a data element and a reference (or pointer) to the next node. The reference to the next node allows traversal through the list, starting from the head and following the references until reaching the tail.
Linked lists provide dynamic memory allocation, efficient insertion and deletion operations, and flexibility in size. However, they have slower access times compared to arrays since sequential traversal is necessary to access a specific element.
Java provides a built-in LinkedList class in the java.util package that implements the linked list data structure. It provides various methods for adding, removing, and accessing elements in the list.
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