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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10.  
  11. 	public static class Node {
  12.         int value;
  13.         Node next;
  14.     }
  15.  
  16.     static class LinkedList {
  17.         Node first;
  18.     }
  19.  
  20.  
  21.  public static void main(String[] args) {
  22.         Node n1 = new Node();
  23.         n1.value = 3;
  24.         Node n2 = new Node();
  25.         n2.value = 2;
  26.         n2.next = n1;
  27.         Node n3 = new Node();
  28.         n3.value = 1;
  29.         n3.next = n2;
  30.  
  31.         LinkedList list = new LinkedList();
  32.         list.first = n3;
  33.  
  34.         Node tNode = list.first;
  35.         while (tNode != null) {
  36.             System.out.println(tNode.value + " ");
  37.             tNode = tNode.next;
  38.         }
  39.  
  40.         tNode = list.first;
  41.         Node oldNext = null;
  42.         while (tNode != null) {
  43.             Node next = tNode.next;
  44.             tNode.next = oldNext;
  45.             oldNext = tNode;
  46.             if(next == null) {
  47.                 list.first = tNode;
  48.             }
  49.             tNode = next;
  50.         }
  51.  
  52.         tNode = list.first;
  53.         while (tNode != null) {
  54.             System.out.println(tNode.value + " ");
  55.             tNode = tNode.next;
  56.         }
  57. }
  58. }
Success #stdin #stdout 0.04s 320576KB
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https://ideone.com/YgZui4
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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