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 result = null;
        List<Integer> valList = new ArrayList<>();
        while(head != null){
            valList.add(head.val);
            head = head.next;
        }
        valList.sort(Comparator.reverseOrder());

        for(Integer i : valList){
            ListNode temp = new ListNode(i);
            temp.next = result;
            result = temp;
        }
        return result;
    }
}