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Explanation of Solution
Method to find the middle node of doubly linked list:
This method moves right from head is assigned to middle node and at the same time moves left from tail is assigned to partner node.
- If the middle and partner node is equal, then return the middle node.
- If middle node is just next node of partner node, then it even number of elements. So, return the previous node of middle node.
Program:
//Define the middle() method
private Node<E> middle()
{
//Check whether the list is empty
if (size == 0)
//Throw an exception
throw new IllegalStateException("List must not be empty");
//Assign the next node of head to middle Node
Node<E> middleNode = head−>next;
//Assign the previous node of tail to partner Node
Node<E> partnerNode = tail−>prev;
/*Loop executes until the middle node and partner node is not equal and next node of middle node and partner node is not equal. */
while (middleNode != partnerNode && middleNode−>next != partnerNode)
{
//Assign next node of middle node to middle node
middleNode = middleNode.getNext();
/*Assign previous node of partner node to partner node...
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Chapter 3 Solutions
Data Structures and Algorithms in Java
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- Develop a procedure for removing duplicates from a linked list by identifying and removing all occurrences of a given key.arrow_forwardIn a circular linked list, how can you determine if a given node is the last node in the list? Describe the approach you would take to solve this problem.arrow_forwardThe nodes of the strongest linkedlist are undetermined.Is one especially lengthy?arrow_forward
- I need a reference page for this question that was answered below. What is the difference between a singly-linked list and a doubly-linked list? In what situation would you use a singly-linked list over a doubly-linked list? In what situation would you use a doubly-linked list over a singly-linked list? If a node is in a linked list with N nodes, how many nodes will be traversed during a search for the node? Explain the best- and worst-case search scenarios. Explain why a singly-linked list defines a RemoveAfter() function, while a doubly-linked list defines a Remove() function. Could a RemoveAfter() function also be defined for a doubly-linked list? Explain why or why not. Could a Remove() function also be defined for a singly-linked list? Explain why or why not.arrow_forwardConsider a software that creates and manipulates a linked list: What are the two particular nodes that the software would usually keep track of? Explain two popular applications for the null reference in the linked list node.arrow_forwardGiven a singly linked list L, devise a method to signal true if list L has a cycleand false otherwise. A cycle is spotted when the link of a node points to a node that was already visited while traversing down the list from its start node.arrow_forward
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