java使用StreamTokenizer类，,下面代码演示如何使用St

java使用StreamTokenizer类，,下面代码演示如何使用St

下面代码演示如何使用StreamTokenizer类来数文本文件中有多少个单词，有多少个数字。

import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import java.io.StreamTokenizer;/** * * @author byrx.net */public class Main {    /**     * StreamTokenizer 类使用示例     */    public void countWordsAndNumbers(String filename) {        StreamTokenizer sTokenizer = null;        int wordCount = 0, numberCount = 0;        try {            sTokenizer = new StreamTokenizer(new FileReader(filename));            while (sTokenizer.nextToken() != StreamTokenizer.TT_EOF) {                if (sTokenizer.ttype == StreamTokenizer.TT_WORD)                    wordCount++;                else if (sTokenizer.ttype == StreamTokenizer.TT_NUMBER)                    numberCount++;            }            System.out.println("Number of words in file: " + wordCount);            System.out.println("Number of numbers in file: " + numberCount);        } catch (FileNotFoundException ex) {            ex.printStackTrace();        } catch (IOException ex) {            ex.printStackTrace();        }    }    /**     * @param args the command line arguments     */    public static void main(String[] args) {        new Main().countWordsAndNumbers("myFile.txt");    }}

文件内容为： 5 ants is more than 4 elephants

输出：

"Number of words in file: 5""Number of numbers in file: 2"