countwords.java

java源程序 对初学者有很大的帮助 从简单到复杂

//********************************************************************
//  CountWords.java       Author: Lewis/Loftus
//
//  Demonstrates the use of the StringTokenizer class and nested
//  loops.
//********************************************************************

import cs1.Keyboard;
import java.util.StringTokenizer;

public class CountWords
{
   //-----------------------------------------------------------------
   //  Reads several lines of text, counting the number of words
   //  and the number of non-space characters.
   //-----------------------------------------------------------------
   public static void main (String[] args)
   {
      int wordCount = 0, characterCount = 0;
      String line, word;
      StringTokenizer tokenizer;

      System.out.println ("Please enter text (type DONE to quit):");

      line = Keyboard.readString();
      while (!line.equals("DONE"))
      {
         tokenizer = new StringTokenizer (line);
         while (tokenizer.hasMoreTokens())
         {
            word = tokenizer.nextToken();
            wordCount++;
            characterCount += word.length();
         }
         line = Keyboard.readString();
      }

      System.out.println ("Number of words: " + wordCount);
      System.out.println ("Number of characters: " + characterCount);
   }
}