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Java Program For Deleting A Linked List Node At A Given Position

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Given a singly linked list and a position, delete a linked list node at the given position.


Input: position = 1, Linked List = 8->2->3->1->7
Output: Linked List =  8->3->1->7

Input: position = 0, Linked List = 8->2->3->1->7
Output: Linked List = 2->3->1->7

If the node to be deleted is the root, simply delete it. To delete a middle node, we must have a pointer to the node previous to the node to be deleted. So if positions are not zero, we run a loop position-1 times and get a pointer to the previous node.

Below is the implementation of the above idea.


// A complete working Java program to delete a node in a linked list
// at a given position
class LinkedList
    Node head;  // head of list
    /* Linked list Node*/
    class Node
        int data;
        Node next;
        Node(int d)
            data = d;
            next = null;
    /* Inserts a new Node at front of the list. */
    public void push(int new_data)
        /* 1 & 2: Allocate the Node &
                  Put in the data*/
        Node new_node = new Node(new_data);
        /* 3. Make next of new Node as head */ = head;
        /* 4. Move the head to point to new Node */
        head = new_node;
    /* Given a reference (pointer to pointer) to the head of a list
       and a position, deletes the node at the given position */
    void deleteNode(int position)
        // If linked list is empty
        if (head == null)
        // Store head node
        Node temp = head;
        // If head needs to be removed
        if (position == 0)
            head =;   // Change head
        // Find previous node of the node to be deleted
        for (int i=0; temp!=null && i<position-1; i++)
            temp =;
        // If position is more than number of nodes
        if (temp == null || == null)
        // Node temp->next is the node to be deleted
        // Store pointer to the next of node to be deleted
        Node next =;
 = next;  // Unlink the deleted node from list
    /* This function prints contents of linked list starting from
        the given node */
    public void printList()
        Node tnode = head;
        while (tnode != null)
            System.out.print(" ");
            tnode =;
    /* Driver program to test above functions. Ideally this function
       should be in a separate user class.  It is kept here to keep
       code compact */
    public static void main(String[] args)
        /* Start with the empty list */
        LinkedList llist = new LinkedList();
Created Linked list is: ");
        llist.deleteNode(4);  // Delete node at position 4
Linked List after Deletion at position 4: ");


Created Linked List: 
 8  2  3  1  7 
Linked List after Deletion at position 4: 
 8  2  3  1 

Time Complexity: O(n), where n represents the length of the given linked list.
Auxiliary Space: O(1), no extra space is required, so it is a constant.

Please refer complete article on Delete a Linked List node at a given position for more details!

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Last Updated : 15 Jun, 2022
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