LinkedList Class in Java. Similar to arrays in Java, LinkedList is a linear data structure. Firstly we create a class named Node. Here, the task is to get the elements of a LinkedList. Every node consists of an address of the next element and its value. This is how one node is connected to the other node. 1. Linked List is a data structure which is of linear type. It consists of 3 fields: In Java, LinkedList class is a doubly-linked list implementation of List and Deque interfaces. Each element in a linked list is known as a node. As already mentioned, LinkedList class is a part of the “java.util” package.Hence you should be able to use the LinkedList class in your program by including one of the following statements in your program. However LinkedList elements are not stored in contiguous locations like arrays, they are linked with each other using pointers. It is one of the frequently used List implementation class. The above diagram shows the hierarchy of the LinkedList class. It implements List, just like ArrayList class, and Deque interfaces. It is a collection of data elements and these data elements are not stored in contiguous fashion in the memory instead each data element has a pointer which points to the next data element in … It’s good to understand how things work, and understanding linked lists is an important step towards understanding more complex data structures, many of which don’t exist in the standard libraries. The toString method should return a string representation of the object and it gets called automatically when the object is printed using the System.out.println statement. This article will help you learn how to solve it in Java. It extends the AbstractList class and implements the List and Deque interfaces. It is an ordered collection and supports duplicate elements. Java LinkedList. It is called a doubly linked list since it contains a link to the previous node as well as the next successive node. As shown, LinkedList class implements the List and Deque interfaces. It also i mplements all optional list operations and permits all … The LinkedList class of the Java collections framework provides the functionality of the linked list data structure (doubly linkedlist). If the LinkedList you want to print contains objects of a custom class, then the class must implement the toString method. But the last node has null stored at its address as it is the last element. LinkedList class in Java uses a doubly linked list to store elements and it also provides a linked-list data structure. 1. Java LinkedList is a doubly-linked list that can store any type of data. Table of Contents. Java Doubly LinkedList. Though Java API or JDK provides a sound implementation of the linked list data structure as java.util.LinkedList, a doubly-linked list, you don't really need to implement a linked list of your own for writing production code, but all these interview questions … Implementing Linked List in Java using Node Class. Just like arrays, Linked List is a linear data structure but unlike arrays, the elements in the linked list are linked together using pointers. Here, the method returns the element which is at the i th index. LinkedList Representation 2. The linked list is a popular data structure for writing programs and lots of questions from a linked list are asked in various Programming Job interviews. Each element of the LinkedList has the reference(address/pointer) to the next element of the LinkedList. In the given example, we have used the get(i) method. There are some differences between the way you’re creating a linked list and the way the Java collections API does it. Java LinkedList is an implementation of the List and Deque interfaces. Linked List is a linear data structure, in which the elements are not stored at the contiguous memory locations. We can use get(int variable) method to access an element from a specific index of LinkedList:. It extends AbstractSequentialList and implements List and Deque interfaces.