DBStack


1   package com.daffodilwoods.daffodildb.utils;
2   
3   import java.util.ArrayList  ;
4   
5   public class DBStack extends ArrayList  {
6   
7      public DBStack() {
8      }
9   
10     public Object   push(Object   item) {
11         add(item);
12         return item;
13     }
14  
15     public Object   pop() {
16         Object     obj;
17         int  len = size();
18         obj = peek();
19         remove(len - 1);
20         return obj;
21     }
22  
23     public Object   peek() {
24         int  len = size();
25         if (len == 0)
26             throw new java.util.EmptyStackException  ();
27         return get(len - 1);
28     }
29  
30     public boolean empty() {
31         return size() == 0;
32     }
33  
34     public int search(Object   o) {
35         int i = lastIndexOf(o);
36         if (i >= 0) {
37             return size() - i;
38         }
39         return -1;
40     }
41  
42     private static final long serialVersionUID = 1976092019760920L;
43  }
44

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