复杂链表的复制 --剑指offer

public class Solution {
       public RandomListNode Clone(RandomListNode pHead)
    {
        if(pHead == null){
            return  null;
        }
        RandomListNode node=pHead;
        while(node != null){
            RandomListNode tem=new RandomListNode(node.label);
            RandomListNode next=node.next;
            node.next=tem;
            tem.next=next;
            node=next;
        }
        node=pHead;
        while(node != null){
            node.next.random = node.random==null?null:node.random.next;
            node = node.next.next;
        }
        node = pHead;
        RandomListNode newHead=node.next;
        while (node != null){
            RandomListNode tem=node.next;
            node.next=tem.next==null?null:tem.next;
            tem.next = node.next==null?null:node.next.next;
            node = node.next;
        }
        return  newHead;
    }
}