版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/Somnus_k/article/details/82590668
public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
ListNode p =l1;
ListNode q = l2;
ListNode head = new ListNode(-1);
ListNode tmp =head;
while(p!=null&&q!=null){
if(p.val<=q.val)
{
tmp.next=p;
p=p.next;
}
else
{
tmp.next=q;
q=q.next;
}
tmp=tmp.next;
}
if(p!=null)
tmp.next=p;
if(q!=null)
tmp.next=q;
//可以将head.next保存下来,然后将head置为null,方便GC
return head.next;
}