1 class Node{ 2     private int data; 3     private Node previous; 4     public Node(){} 5     public int getData(){ 6         return data; 7     } 8     public void setData(int data){ 9         this.data=data;10     }11     public Node getPrevious(){12         return previous;13     }14     public void setPrevious(Node previous){15         this.previous=previous;16     }17 }18 class Stack1{19     private Node top;20     public Stack1(int data){21         top = new Node();22         top.setData(data);23         top.setPrevious(null);24     }25     26     public void push(int data){27         Node temp = new Node();28         temp.setData(data);29         temp.setPrevious(top);30         top = temp;31     }32     public int pop(){33         int popnum=0;34         popnum = top.getData();35         top=top.getPrevious();36         return popnum;37     }38     public boolean isempty(){39         if( top==null) return false;40         else return true;41     }42 }43 public class Stack {44     public static void main(String[] args){45         Stack1 s = new Stack1(0);46         for(int i=0;i<10;i++){47             s.push(i);48         }49         while(!s.isempty()){50             System.out.println(s.pop()+" ");51         }52     }53 54 }