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  1. Prepare
  2. Data Structures
  3. Linked Lists
  4. Insert a node at a specific position in a linked list
  5. Discussions

Insert a node at a specific position in a linked list

  • wilson155079
     + 0 comments
        public static SinglyLinkedListNode insertNodeAtPosition(SinglyLinkedListNode llist, int data, int position) {
        SinglyLinkedListNode newNode = new SinglyLinkedListNode(data);

        // If inserting at the head (position 0)
        if (position == 0) {
            newNode.next = llist;
            return newNode;
        }
        
        // Traverse the list to find the node before the desired position
        SinglyLinkedListNode current = llist;
        for (int i = 0; i < position - 1 && current != null; i++) {
            current = current.next;
        }
        
        // Insert the new node
        if (current != null) {
            newNode.next = current.next;
            current.next = newNode;
        }
        
        return llist;
    }