Enter a linked list to print the value of each node of the list from the end of the head

Source: Internet
Author: User

Title Description:

Enter a list to print the values of each node of the list from the end of the head.

Input Description:

input as linked list the table header


Output Description:

output as a "new linked list" header that needs to be printed


Stack processing:

/***    public class listnode {*         int val;*        listnode next = null;**         listnode (Int val)  {*             this.val = val;*         }*    }**/import java.util.Stack;import java.util.ArrayList;public  class solution {    public arraylist<integer>  Printlistfromtailtohead (Listnode listnode)  {     Stack<Integer>  Sk=new stack<integer> ();         while (listNode!=null)          {             sk.push (listnode.val);             listnode=listnode.next;         }         ArrayList<Integer>  Al=new  arraylist<integer> ();         while (!sk.isEmpty ())         {             al.add (Sk.pop ());        }         return al;    }}

recursive:

/***    public class listnode {*         int val;*        listnode next = null;**         listnode (Int val)  {*             this.val = val;*         }*    }**/import java.util.arraylist;public class solution {     public arraylist<integer> printlistfromtailtohead (ListNode  ListNode)  {        ArrayList<Integer> list=new  Arraylist<integer> ();                 listnode pnode=listnode;        if (PNode!=null) {&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSp;      if (pnode.next!=null) {                 list=printlistfromtailtohead (PNode.next);             }             list.add (Pnode.val);        }                 return list;     }}



Enter a linked list to print the value of each node of the list from the end of the head

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