英语单词统计

能够实现单词个数统计和字母个数统计 并且将这些导入文本中

public static void main(String[] args)throws IOException//扔掉很重要
{
      // 新文件
        File newFile = new File("E:\\eclipse-workspace\\2.0\\src\\英语单词统计\\计算结果.txt");
        int count_xiao = 0,count_da=0;
        // 读取文件内容
        File file = new File("E:\\eclipse-workspace\\2.0\\src\\英语单词统计\\Harry Potter.txt");
        BufferedReader reader = new BufferedReader(new FileReader(file));//读取数据
        StringBuffer sb = new StringBuffer();//对字符串进行修改 并且可以进行多次修改 并且不产生新的未使用对象
        String line = null;//行数
        while ((line = reader.readLine()) != null) {
            sb.append(line);//之间的简单相加
        }
        reader.close();
        // 统计大小写字母个数
        
        for (int i = 0; i < sb.length(); i++) {
            char ch = sb.charAt(i);//读取第i个字母
            if ((ch >= 'a' && ch <= 'z') ) {
                count_xiao ++;
            }
            else if ( (ch >= 'A' && ch <= 'Z')) {
                count_da ++;
            }
        }
        System.out.println("小写个数："+count_xiao);
        System.out.println("大写个数："+count_da);
        //计算单词个数
        int sum_dan=1;
        for (int i = 0; i < sb.length(); i++) {
            char ch = sb.charAt(i);//读取第i个字母
            //如果有空格逗号句号空格换行冒号就是一个新的单词
            if (ch<'A'||(ch>'Z'&&ch<'a')||ch>'z'){
                sum_dan ++;
                char c=sb.charAt(i+1);
                if (c<'A'||(c>'Z'&&c<'a')||c>'z') 
                {
                 sum_dan--;
                }
            }
            
        }
        System.out.println("单词个数："+sum_dan);
        String s;
        String[] buffer=null ;
        int[] sum_geshu;
        sum_geshu=new int[(int) sum_dan];
        for (int i = 0; i < sb.length(); i++)
        {   s=reader.readLine();
      while(s!=null)
      {buffer=s.split("\\s+");
      }
        }
        reader.close();
        for(int i=0;i<sum_dan;i++)
        {
         for(int j=i+1;j<sum_dan;j++)
         {
          if(buffer[i]==buffer[j])
          {
           sum_geshu[i]=0;
           sum_geshu[i]=sum_geshu[i]+1;
           buffer[j]=null;
           sum_geshu[j]=0;
          }
         }
        }
        for(int i=0;i<sum_dan;i++)
        {
         System.out.print(buffer[i]+":"+sum_geshu[i]);
        }
        FileOutputStream out = new FileOutputStream(newFile);
        out.write(String.valueOf(count_xiao).getBytes());
        out.write(String.valueOf(count_da).getBytes());
        out.write(String.valueOf(sum_dan).getBytes());
        out.flush();
        out.close();
}