Delete Last Node of a Linked List

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I am practicing working with Linked List Nodes and have come upon a problem I don't know how to answer. How do you go about deleting the last node in a linked list. The code below works for all entry's bar the last node. The last does not get deleted.

Node Class

public class Node {

    private String data;
    private Node next;

    Node(String data, Node next)
    {
        this.data = data;
        this.next = next;
    }

    public void setData(String d)
    {
        data = d;
    }

    public void setNext(Node n)
    {
        next = n;
    }

    public String getData()
    {
        return data;
    }

    public Node getNext()
    {
        return next;
    }

Main

Node list = new Node("NODE 1",new Node("NODE 2",new Node("NODE 3", null)));
        list = insertSecond(list,"New Node");
        list = addLast(list,"LAST NODE");

        printList(list);
        System.out.println();
        deleteNode(list,"LAST NODE");
        printList(list);    
    }

    public static Node deleteNode(Node list,String str)
    {
        Node temp = list;
        Node prev = list;

        while(temp.getNext() != null)
        {
            if(temp.getData().equals(str))
            {
                if(prev.getNext() == null)
                    prev.setNext(null);
                else{
                prev.setNext(prev.getNext().getNext());
                }

            }
            prev = temp;
            temp = temp.getNext();
        }

I would guess while(temp.getNext() != null) fails for your last element. The last element won't have a next element. So the last element is not compared against the passed string. You should trace this with the debugger.

Delete the last node of a single linked list using the single pointer to , C programming, exercises, solution : Write a program in C to delete the last node of Singly Linked List. If there are more than two items in your list, your have to iterate to the last second element, set its next value to NULL, and delete the last node with the help of a temp pointer. void pop_back(struct node** firstNode) { struct node* p = *firstNode; if(p == NULL) cout << "List empty."


while(temp != null){
  prev = temp;
  temp = temp.getNext();

}

prev.next = null;

Try this:

C exercises: Delete the last node of Singly Linked List, In order to delete last node, we need to set the second last node's next pointer to NULL value Duration: 6:57 Posted: Nov 5, 2019 Remove last node of the linked list; Remove first node of the linked list; Remove every k-th node of the linked list; Create new linked list from two given linked list with greater element at each node; Swap Kth node from beginning with Kth node from end in a Doubly Linked List; Swap Kth node from beginning with Kth node from end in a Linked List


It's easiest if you use a doubly-linked List, where your list knows both start and end.

Then you can just do something like this:

public void removeLastItem(){
    this.lastNode = this.lastNode.prev;
}

Remove last node of the Linked List, In order to delete last node, we need to set the second last node's next pointer to NULL value.Duration: 6:57 Posted: Nov 5, 2019 Steps to implement. If the list is empty, done. Desired node not found. If the first node is the desired node, set the headOfList pointer to the headOfList->nextNode value. Done. Desired node found. Set the currentNode pointer equal to the headOfList pointer value. If the currentNode node is the


This is very simple technique that I used to delete the last Node.

public void deleteLast() {
    Node curr = null;

    for (curr = this.first; curr.next.next != null;curr = curr.next) {

    }

    curr.next = null;
}

Remove Last Node Of The LinkedList, For complete course enroll at below link - https://www.udemy.com/course/ visualizing-data Duration: 6:17 Posted: Nov 12, 2015 Steps to delete last node of a Singly Linked List Traverse to the last node of the linked list keeping track of the second last node in some temp variable say If the last node is the head node then make the head node as NULL else disconnect the second last node with the last Free the memory


You need something like this:

public static Node deleteNode(Node list, String str) {
  Node temp = list;
  Node prev = list;

  do {
    if (temp.getData().equals(str)) {
      if (prev.getNext() == null) {
        prev.setNext(null);
      } else {
        prev.setNext(prev.getNext().getNext());
      }
    }
    prev = temp;
    temp = temp.getNext();
  } while (temp != null);

  return list;
}

You were stopping your loop too early.

BTW: if (prev.getNext() == null) { prev.setNext(null); ... doesn't make sense but I'll leave that bug to you.

How to delete last node of a Singly Linked List in Java ?, You cannot go backward in a (simple) linked list. We can find the last node in a list as follows: ptr = head´┐Ż Linked List : Delete the last node of Singly Linked List : ----- Input the number of nodes : 3 Input data for node 1 : 1 Input data for node 2 : 2 Input data for node 3 : 3 Data entered in the list are : Data = 1 Data = 2 Data = 3 The new list after deletion the last node are : Data = 1 Data = 2


Deleting a node at the tail of a list, Traverse through the list to find out the second last node which in this case is node 4. Make node 4 as the tail of the list. Node 4's next will point to null. Algorithm. To delete a node from the linked list, first, we need to find the node with the given value. We compare given value with the value of each node of the list; if the values match, we found the node to delete.


Java program to delete a node from the end of the singly linked list , Write a C program to create a singly linked list of n nodes and delete the last node of the list. How to delete last node of a singly linked list in C. In the given doubly linked list, delete a node. We can delete head node, middle node or last node. Example. Algorithm. Time complexity : O(1) Step 1 : create a function which takes a linked list and node that had to be deleted as arguments and delete the node. Step 2 : If you want to delete a head node.


C program to delete last node of Singly Linked List, So to delete the last node from a singly linked list, you invoke a function from that node (this is the additional data I believe the interviewer was talking about) that: Input: head = [4,5,1,9], node = 1 Output: [4,5,9] Explanation: You are given the third node with value 1, the linked list should become 4 -> 5 -> 9 after calling your function. Note: The linked list will have at least two elements. All of the nodes' values will be unique.