Java 单链表删除指定值节点算法实现

class ListNode {
    int val;
    ListNode next;

    ListNode(int val) {
        this.val = val;
        this.next = null;
    }
}

public class Solution {
    public ListNode removeElements(ListNode head, int val) {
        ListNode dummy = new ListNode(0);
        dummy.next = head;
        ListNode prev = dummy;
        ListNode curr = head;

        while (curr != null) {
            if (curr.val == val) {
                prev.next = curr.next;
            } else {
                prev = curr;
            }
            curr = curr.next;
        }

        return dummy.next;
    }
}