高手帮忙！！！

import java.util.*;
import *;
public class tongji {
        
    /**
     * Creates a new instance of <code>tongji</code>.
     */
    public tongji() {
    }
   
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        int count[]=new int[26];   //用来统计小写字母个数
        int countb[]=new int[26];   //用来统计大写字母个数
        byte[] b = new byte[26];
      
        Scanner read = new Scanner(System.in);
        String filename = read.nextLine();
        File file = new File(filename);
            String str="";
        if(file.exists())
        {
          try{
              FileInputStream fis = new FileInputStream(file);
              int n=0;
         
              while((n=fis.read(b,0,1))!=-1)
              {
                  String s = new String(b,0,n);
                  str +=s;
                  
              }
          }catch(IOException E)
          {}
           System.out.println(str);
        char[] aa = str.toCharArray();
        for(int i=0;i<aa.length;i++)
        {
            if(aa[i]>=97)
            {
            
            int num = (aa[i]-'a');           
            count[num]++;
            }
            else if(aa[i]<=91&&aa[i]>=65)
            {
                int k = aa[i]-65;
                countb[k]++;
            }
        }
        char c='a';
        for(int j=0;j<26;j++)
        {
            
            System.out.print(c+"的个数有"+count[j]);
            System.out.println();
            c = (char)(c+1);
        }
        char C = 'A';
         for(int j=0;j<26;j++)
        {
            
            System.out.print(C+"的个数有"+countb[j]);
            System.out.println();
            C = (char)(C+1);
        }
            
        }
            
            else
                System.out.print("文件不存在");
      
    }
}
做的不好 希望可以帮助到你 主要是思想 要利用字母的ASCII码

好的，谢谢，我可去改一下

汗。。。。。。今天看了一下之后才发现你统计的是字母，不是单词！！！
不过没关系，再接再厉，有什么好的程序，发来共享！