第三周（JAVA编写的 wordcount）

import java.io.*;
public class WordCount {
    public static int words=1;
    public static int lines=1;
    public static int chars=1;
    public static void wc(InputStream f) throws IOException{
        int c=0;
        boolean last = false;
        String nullspace =" 	

";
        
        while ((c=f.read()) !=-1 ){
            chars++;                    //包括空格  换行 
            if (c == '
')
            {
                lines++;
            }
            if (nullspace.indexOf(c)!=-1)
            {
                if(last){
                    words++;
                }
                last =false;
            }
            else{
                last=true;
            }
                
        }
        
    }
    public static void main(String args[]){
        FileInputStream f;
        try{
            if(args.length==0){
                f=new FileInputStream("h:/test.txt");
                wc(f);
            }
            
                
        }catch (IOException e)  //确保程序不会因出错崩溃
        {
            System.out.println("文件不存在！");
            return;
        }
        if(words==1 && lines==1 && chars==1)
        {
            System.out.println("文件为空!");
        }
        else{
            System.out.println(lines + "行 
" + words + "个单词
" +  chars + "个字符");
        }
    }

}