exceptionaltest.java

Java经典教程core java

/**
   @version 1.10 2000-06-03
   @author Cay Horstmann
*/

import java.util.*;

public class ExceptionalTest
{  
   public static void main(String[] args)
   {  
      int i = 0;
      int ntry = 1000000;
      Stack s = new Stack();
      long s1;
      long s2; 

      // test a stack for emptiness ntry times
      System.out.println("Testing for empty stack");
      s1 = new Date().getTime();
      for (i = 0; i <= ntry; i++)
         if (!s.empty()) s.pop();
      s2 = new Date().getTime();
      System.out.println((s2 - s1) + " milliseconds");
         
      // pop an empty stack ntry times and catch the
      // resulting exception
      System.out.println("Catching EmptyStackException");
      s1 = new Date().getTime();
      for (i = 0; i <= ntry; i++)
      { 
         try
         {  
            s.pop();
         }
         catch(EmptyStackException e)
         {
         }
      }         
      s2 = new Date().getTime();
      System.out.println((s2 - s1) + " milliseconds");
   }
}