settest.java

corejava的源程序内有好多的源代码

/**
   @version 1.00 1999-07-07
   @author Cay Horstmann
*/

import java.util.*;
import java.io.*;

/**
   This program uses a set to print all unique words in 
   System.in.
*/
public class SetTest
{ 
   public static void main(String[] args)
   {  
      Set words = new HashSet(59999);
         // set to HashSet, LinkedHashSet or TreeSet
      long totalTime = 0;

      try
      {  
         BufferedReader in = new
            BufferedReader(new InputStreamReader(System.in));
         String line;
         while ((line = in.readLine()) != null)
         {  
            StringTokenizer tokenizer = new StringTokenizer(line);
            while (tokenizer.hasMoreTokens())
            {  
               String word = tokenizer.nextToken();
               long callTime = System.currentTimeMillis();
               words.add(word);
               callTime = System.currentTimeMillis() - callTime;
               totalTime += callTime;
            }
         }
      }
      catch (IOException e)
      {  
         System.out.println("Error " + e);
      }

      Iterator iter = words.iterator();
      while (iter.hasNext())
         System.out.println(iter.next());
      System.out.println(words.size()
         + " distinct words. " + totalTime + " milliseconds.");
   }
}