Java面试题-实现复杂链表的复制代码分享

public class Solution {  public RandomListNode Clone(RandomListNode pHead)  {    copyNodes(pHead);    setClonedNodes(pHead);    return splitNodes(pHead);  }    //第一步，复制链表任意结点N并创建新结点N‘，再把N'链接到N的后面   public static void copyNodes(RandomListNode head){     RandomListNode temp = head;    while(temp!=null){     RandomListNode clonedNode = new RandomListNode(0);     clonedNode.next = temp.next;     clonedNode.label = temp.label;     clonedNode.random = null;     temp.next = clonedNode;     temp = clonedNode.next;    }   }   //第二步，设置复制出来的结点   public static void setClonedNodes(RandomListNode head){    RandomListNode pNode = head;    while(pNode!=null){     RandomListNode pCloned = pNode.next;     if(pNode.random!=null){      pCloned.random = pNode.random.next;      }     pNode = pCloned.next;    }   }   //第三步，将第二步得到的链表拆分成两个链表   public static RandomListNode splitNodes(RandomListNode head){    RandomListNode pNode = head;    RandomListNode clonedHead = null;    RandomListNode clonedNode = null;    if(pNode!=null){     clonedHead = pNode.next;     clonedNode = pNode.next;     pNode.next = clonedNode.next;     pNode = pNode.next;    }    while(pNode!=null){     clonedNode.next = pNode.next;     clonedNode = clonedNode.next;     pNode.next = clonedNode.next;     pNode = pNode.next;    }    return clonedHead;   }}