39 lines
1.0 KiB
Java
39 lines
1.0 KiB
Java
package linkedlist;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* 题目： 21. 合并两个有序链表 (mergeTwoLists)
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* 描述：将两个升序链表合并为一个新的 升序 链表并返回。新链表是通过拼接给定的两个链表的所有节点组成的。
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* 链接：https://leetcode.cn/problems/merge-two-sorted-lists/
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*/
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public class MergeTwoLists {
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public ListNode mergeTwoLists(ListNode list1, ListNode list2) {
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ListNode head = new ListNode(-1);
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ListNode mv = head;
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ListNode mv1 = list1;
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ListNode mv2 = list2;
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while(mv1 != null && mv2 !=null) {
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if(mv1.val < mv2.val) {
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mv.next = mv1;
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mv1 = mv1.next;
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}
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else {
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mv.next = mv2;
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mv2 = mv2.next;
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}
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mv = mv.next;
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}
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if(mv1 == null) {
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mv.next = mv2;
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}
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else {
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mv.next = mv1;
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}
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return head.next;
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}
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}
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