题解 | #牛群的身高排序#

import java.util.*;

/*
 * public class ListNode {
 *   int val;
 *   ListNode next = null;
 *   public ListNode(int val) {
 *     this.val = val;
 *   }
 * }
 */

public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param head ListNode类 
     * @return ListNode类
     */
    public ListNode sortList (ListNode head) {
        // write code here
       
        ListNode temp = head;
        ListNode result = new ListNode(-1);
        ListNode node = result;
        ArrayList<Integer> list = new ArrayList<>();
        while (temp != null) {
            list.add(temp.val);
            temp = temp.next;
        }
        Collections.sort(list);
        for (int i = 0; i < list.size(); i++) {
            ListNode cur = new ListNode(list.get(i));
            result.next = cur;
            result = result.next;
        }
        return node.next;
    }
}