/**
 * Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.
 *
 * Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list should
 * become 1 -> 2 -> 4 after calling your function.
 *
 * Tags: LinkedList
 * Similar Problems: (E) Remove Linked List Elements
 */
public class DeleteNodeInLinkedList {

    public static void main(String[] args) {

    }

    public void deleteNode(ListNode node) {
        if (node == null || node.next == null) return;
        node.val = node.next.val;
        node.next = node.next.next;
    }
}

/**
 * Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.
 *
 * Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list should
 * become 1 -> 2 -> 4 after calling your function.
 *
 * Tags: LinkedList
 * Similar Problems: (E) Remove Linked List Elements
 */
public class DeleteNodeInLinkedList {

    public void deleteNode(ListNode node) {
        if (node == null || node.next == null) return;
        node.val = node.next.val;
        node.next = node.next.next;
    }
}

remove empty main method