In the end, since the current has gone one place ahead of the last element, we need to set the head to the last element we reached. Set the next of the current Node to the previous.Save the next Node of the current element in the next pointer.Loop the following till current is NOT null: Create 3 instances: current, next, previous. Following illustration demonstrates how we will reverse our LinkedList by changing the references.įollowing are the steps to be followed to reverse a LinkedList. To reverse a LinkedList iteratively, we need to store the references of the next and previous elements, so that they don’t get lost when we swap the memory address pointers to the next element in the LinkedList. Iterative Approach to Reverse a Linked List We can reverse a LinkedList such that the head and tail also get changed using: The next address stored in this node is null. The tail of the LinkedList is the last node. No other element has the address stored for this. Input Output The head of the LinkedList is the first node. In order to reverse a LinkedList in place, we need to reverse the pointers such that the next element now points to the previous element. The address for the previous element and next element.
LinkedList elements are popularly known as nodes.ĭoubly LinkedList store two addresses. Every element of a LinkedList contains a data part and an address to the next element of the LinkedList. LinkedList is a data structure which stores the data in a linear way.
In this tutorial, we’ll be discussing the various algorithms to reverse a Linked List and then implement them using Java. Reversing a Linked List is an interesting problem in data structure and algorithms.
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