把我注释下列代码/** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode() {} * ListNode(int val) { this.val = val; } * ListNode(int val, ListNode next) { this.val = val; this.next = next; } * } */ class Solution { public ListNode partition(ListNode head, int x) { ListNode small = new ListNode(0); ListNode smallHead = small; ListNode large = new ListNode(0); ListNode largeHead = large; while (head != null) { if (head.val < x) { small.next = head; small = small.next; } else { large.next = head; large = large.next; } head = head.next; } large.next = null; small.next = largeHead.next; return smallHead.next; } }

这段代码是一个将链表按照给定值x分割的函数。注释如下：

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode() {}
 *     ListNode(int val) { this.val = val; }
 *     ListNode(int val, ListNode next) { this.val = val; this.next = next; }
 * }
 */
class Solution {
    // 将链表按照给定值x分割
    public ListNode partition(ListNode head, int x) {
        // 创建两个虚拟节点small和large，分别表示小于x和大于等于x的链表部分
        ListNode small = new ListNode(0);
        ListNode smallHead = small;
        ListNode large = new ListNode(0);
        ListNode largeHead = large;
        // 遍历链表中的每个节点
        while (head != null) {
            // 如果节点的值小于x，则将节点连接到small链表的末尾，并更新small指针
            if (head.val < x) {
                small.next = head;
                small = small.next;
            } 
            // 如果节点的值大于等于x，则将节点连接到large链表的末尾，并更新large指针
            else {
                large.next = head;
                large = large.next;
            }
            // 遍历下一个节点
            head = head.next;
        }
        // 将large链表的末尾指向null，避免出现环形链表
        large.next = null;
        // 将small链表的末尾连接到large链表的头部，得到最终的分割链表
        small.next = largeHead.next;
        // 返回small链表的头部作为结果
        return smallHead.next;
    }
}

注释的作用是解释代码的功能和实现思路，便于其他开发人员理解和维护代码。