StackTest


1   import java.util.*;
2   import org.apache.avalon.excalibur.collections.ArrayStack;
3   
4   public class StackTest
5   {
6    public static void main(String  [] args)
7    {
8     int lInitialSize = Integer.parseInt(args[0]);
9     int lIterations = Integer.parseInt(args[1]);
10    ArrayList lArrayList = new ArrayList(lInitialSize + 1);
11    LinkedList lLinkedList = new LinkedList();
12    Stack lStack = new Stack();
13    ArrayStack lArrayStack = new ArrayStack();
14    long lBegin, lEnd;
15  
16    for (int i = 0; i < lInitialSize; i++)
17    {
18     lArrayList.add(new Integer  (i));
19     lLinkedList.add(new Integer  (i));
20     lStack.push(new Integer  (i));
21     lArrayStack.push(new Integer  (i));
22    }
23  
24    lBegin = System.currentTimeMillis();
25    for (int i = 0; i < lIterations; i++)
26    {
27     lArrayList.add(new Integer  (i));  // Add to the tail
28     lArrayList.remove(lInitialSize);  // Remove from the tail
29    }
30    lEnd = System.currentTimeMillis();
31    System.out.println("Time: " + (lEnd - lBegin));
32  
33    lBegin = System.currentTimeMillis();
34    for (int i = 0; i < lIterations; i++)
35    {
36     lLinkedList.addLast(new Integer  (i));  // Add to the tail
37     lLinkedList.removeLast();  // Remove from the tail
38    }
39    lEnd = System.currentTimeMillis();
40    System.out.println("Time: " + (lEnd - lBegin));
41  
42    lBegin = System.currentTimeMillis();
43    for (int i = 0; i < lIterations; i++)
44    {
45     lStack.push( new Integer  (i) );  // Add to the head
46     lStack.pop();  // Remove from the tail
47    }
48    lEnd = System.currentTimeMillis();
49    System.out.println("Time: " + (lEnd - lBegin));
50  
51    lBegin = System.currentTimeMillis();
52    for (int i = 0; i < lIterations; i++)
53    {
54     lArrayStack.push( new Integer  (i) );  // Add to the head
55     lArrayStack.pop();  // Remove from the tail
56    }
57    lEnd = System.currentTimeMillis();
58    System.out.println("Time: " + (lEnd - lBegin));
59   }
60  }
61
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