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  1. package Stack.List;
  2.  
  3. class Cell {
  4.  
  5.     private Object date;
  6.     private Cell next;
  7.  
  8.     Object getdate() {
  9.         return date;
  10.     }
  11.  
  12.     Cell getnext() {
  13.         return next;
  14.     }
  15.  
  16.     Cell(Object x, Cell c) {
  17.         this.date = x;
  18.         this.next = c;
  19.     }
  20. }
  21.  
  22. public class Stack {
  23.     private Cell top;
  24.     private int size = 10;
  25.     private int nCell = 0;
  26.  
  27.     public void push(Object o) {
  28.         if (nCell >= size) throw new StackOverflowException();
  29.         Cell a = new Cell(o, top);
  30.         top = a;
  31.         nCell++;
  32.     }
  33.  
  34.     public Object pop() {
  35.         if (top == null) throw new StackUnderflowException();
  36.         Cell o_top = top;
  37.         top = top.getnext();
  38.         nCell--;
  39.         return o_top.getdate();
  40.     }
  41.  
  42.     public int size() {
  43.         return nCell;
  44.     }
  45.  
  46.     public static class StackException extends RuntimeException {}
  47.     public static class StackOverflowException extends StackException {}
  48.     public static class StackUnderflowException extends StackException {}
  49. }
  50.  
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https://ideone.com/7akfGN
language:
Java (12.0.1)
created:
11 years ago
visibility:
public

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