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 pHead1 ListNode类 * @param pHead2 ListNode类 * @return ListNode类 */ public ListNode Merge (ListNode pHead1, ListNode pHead2) { // write code here //链表2空返回链表1 if(pHead2==null) return pHead1; //链表1空返回链表2 if(pHead1==null) return pHead2; //比较大小递归调用 if(pHead1.val<=pHead2.val){ pHead1.next=Merge(pHead1.next,pHead2); return pHead1; } else{ pHead2.next=Merge(pHead2.next,pHead1); return pHead2; } } }