Pairwise swap of a given linked list by changing links
Input: 1->->2->3->4->5 Output: 2->1->4->3->5 Code: package linkedlist; public class Swaplinks { Node head = null; void swap(){ Node prev = head; Node curr = head.next; head = curr; while(true){ Node temp = curr.next; curr.next = prev; //for last node or null node if(temp == null || temp.next == null){ ...