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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. 	private static class Node {
  11. 		int data;
  12. 		Node next;
  13. 	}
  14.  
  15. 	Node head;
  16.     public void push(int data)
  17.     {
  18.         Node node =new Node();
  19.         node.data=data;
  20.         node.next=null;
  21.         if(head==null)
  22.         {
  23.             head=node;
  24.  
  25.         }
  26.         else
  27.         {
  28.             Node n=head;
  29.             while (n.next!=null)
  30.             {
  31.                 n=n.next;
  32.             }
  33.             n.next=node;
  34.         }
  35.  
  36.     }
  37.     public void pop()
  38.     {
  39.         if(head==null)
  40.         {
  41.             System.out.println("Stack has 0 items .. cant delete");
  42.         }
  43.         else if(head.next == null) {
  44.         	head = null;
  45.         }
  46.         else {
  47.             Node n = head;
  48.             while (n.next != null && n.next.next != null) {
  49.                 n = n.next;
  50.             }
  51.             n.next=null;
  52.         }
  53.     }
  54.     public void show()
  55.     {
  56.         Node n=head;
  57.         while(n != null)
  58.         {
  59.             System.out.println(n.data);
  60.             n=n.next;
  61.         }
  62.     }
  63.  
  64.     public static void main(String[] args) {
  65.         Ideone stk=new Ideone();
  66.         stk.push(4);
  67.         stk.push(54);
  68.  
  69.         stk.push(23);
  70.         stk.push(90);
  71.  
  72.         stk.pop();
  73.  
  74.         stk.show();
  75.         stk.pop(); stk.pop(); stk.pop();
  76.         stk.show();
  77.  
  78.     }
  79.  
  80. }
Success #stdin #stdout 0.05s 27964KB
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4
54
23
https://ideone.com/joOYh7
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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