题解 | #合并两群能量值#

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 l1 ListNode类 
     * @param l2 ListNode类 
     * @return ListNode类
     */
    public ListNode mergeEnergyValues (ListNode l1, ListNode l2) {
        // write code here
        List<Integer> valList = new ArrayList<>();
        while(l1 != null){
            valList.add(l1.val);
            l1 = l1.next;
        }

        while(l2 != null){
            valList.add(l2.val);
            l2 = l2.next;
        }

        ListNode result = null;
        valList.sort(Integer::compareTo);
        for(Integer val : valList){
            ListNode temp = new ListNode(val);
            temp.next = result;
            result = temp;
        }

        return result;
    }
}